The defendant appeals challenging the denial of his motion to suppress evidence pursuant to General Statutes § 54-94a.1 The defendant was convicted of possession of a narcotic substance in violation of General Statutes § 21a-279 (a). The defendant was sentenced to a five year term of imprisonment, to run consecutive to any sentence then being served. The sole issue in this appeal is whether the trial court properly denied the motion to suppress narcotics. The defendant claims that (1) the trial court improperly found probable cause to arrest him allegedly on the sole basis of an uncorroborated statement from a confidential informant, and (2) the warrantless search was not justified in the absence of probable cause. Because we disagree with the defendant’s first claim, we need not reach the second.
*743The following evidence was presented at the suppression hearing. On May 25, 1990, Officers Dennis Griswold and Larry Kozikowski of the Willimantic police department approached an individual who had often served as a confidential informant. On previous occasions, the informant had given Griswold information leading to fifteen arrests for narcotics violations.2 Griswold was a detective investigating narcotics violations for four years prior to the incident, and had a total of fifteen years of experience as a police officer. Griswold testified that he had attended federal, state, and local schools that train narcotics investigators, and had made approximately 1000 narcotics arrests. The officers asked the informant if he had any information for them that evening. In response, the informant told them that he had just left the Shark Club, a local bar, where he had seen the defendant selling “dope and coke,” vernacular for heroin and cocaine. Griswold knew that the Shark Club was a popular location for the sale of illegal narcotics. The informant identified the defendant by name. Griswold recognized the name of the defendant as a convicted narcotics dealer who was on parole, and was aware that the defendant had been arrested on prior occasions for drug offenses.
After receiving the information from the informant, the officers returned to their car and radioed police headquarters. Within minutes of receiving the information from the informant, they entered the bar and located the defendant. They approached him and asked him to come outside with them. They then took the defendant by the arms and escorted him outside. Once outside, the officers searched the defendant. In one of *744his pockets, the officers found five small plastic bags containing white powder, which field tested positive as heroin. The officers then arrested the defendant and took him to police headquarters where he was more thoroughly searched.3 This search at police headquarters produced three small plastic packets, which tests proved to be cocaine. Thereafter, Griswold completed an affidavit of probable cause to support the warrant-less search.4
*745“Under both the federal and state constitutions, a warrantless search is per se unreasonable, subject to a few well defined exceptions. State v. Dukes, 209 Conn. 98, 121, 547 A.2d 10 (1988); State v. Januszewski, 182 Conn. 142, 151-52, 438 A.2d 679 (1980), cert. denied, 453 U.S. 922, 101 S. Ct. 3159, 69 L. Ed. 2d 1005 (1981).” State v. Quinones, 21 Conn. App. 506, 510, 574 A.2d 1308 (1990). One of these well defined exceptions is a search incident to a lawful arrest. “It is an established rule that a properly conducted warrantless search incident to a lawful arrest is not illegal. . . . Section [54-If5] of the General Statutes authorizes a police officer to arrest, without a warrant, ‘any person who such officer has reasonable grounds to believe has committed or is committing a felony.’ ” (Citations omitted.) State v. Penland, 174 Conn. 153, 155, 384 A.2d 356, cert. denied, 436 U.S. 906, 98 S. Ct. 2237, 56 L. Ed. 2d 404 (1978); State v. Velez, 215 Conn. 667, 672, 577 A.2d 1043 (1990).6
In State v. Barton, 219 Conn. 529, 546, 594 A.2d 917 (1991), our Supreme Court adopted the “totality of the circumstances” analysis of the probable cause requirement as set forth in Illinois v. Gates, 462 U.S. 213, 103 S. Ct. 2317, 76 L. Ed. 2d 527 (1983).7 The court set *746forth the analysis as follows. “In essence, our adoption of a ‘totality of the circumstances’ analysis of the probable cause requirement of article first, § 7, [of the Connecticut constitution] means simply this: When a search warrant affidavit is based on information provided to the police by confidential informants, the magistrate should examine the affidavit to determine whether it adequately describes both the factual basis of the informant’s knowledge and the basis on which the police have determined that the information is reliable. If the warrant affidavit fails to state in specific terms how the informant gained his knowledge or why the police believe the information to be trustworthy, however, the magistrate can also consider all the circumstances set forth in the affidavit to determine whether, despite these deficiencies, other objective indicia of reliability reasonably establish that probable cause to search exists. In making this determination, the magistrate is entitled to draw reasonable inferences from the facts presented. When a magistrate has determined that the warrant affidavit presents sufficient objective indicia of reliability to justify a search and has issued a warrant, a court reviewing that warrant at a subsequent suppression hearing should defer to the reasonable inferences drawn by the magistrate. Where the circumstances for finding probable cause are detailed, where a substantial basis for crediting the source of information is apparent, and when a magistrate has in fact found probable cause, the reviewing court should not invalidate the warrant by application of rigid analytical categories.” State v. Barton, supra, 544-45. Indeed, “the reviewing court should pay great deference to the trial court’s determination regarding the existence of probable cause.” State v. Velez, supra, 673.
*747On the basis of the evidence, the trial court found that the officers had probable cause for their belief that the defendant was in possession of illegal narcotics at the time of the search. The court considered the facts that the defendant had been previously arrested for a narcotics violation, and the informant had given information leading to fifteen narcotics arrests. The court further found that although the informant in the present case did not explicitly tell the officers that he saw the actual narcotic substances, Griswold was entitled to draw the inference that the informant would recognize a drug transaction when he saw one because both the officer and the informant were familiar with drug transactions. Consequently, the trial court found that the arrest was based on probable cause and the warrantless search was valid, and denied the defendant’s motion to suppress.
In McCray v. Illinois, 386 U.S. 300, 87 S. Ct. 1056, 18 L. Ed. 2d 62 (1967), the United States Supreme Court examined whether information gained from a confidential informant was sufficient to establish probable cause so as to validate an arrest and subsequent warrantless search. In McCray, the informant had supplied the arresting officers with information about narcotics activities on at least fifteen prior occasions, with the information leading to numerous arrests and convictions. Id., 303. The arresting officer was familiar with the petitioner. Id., 302. After receiving information from the informant that the petitioner would be in a certain location, the arresting officers located the petitioner there. Id. The court stated that “[ujpon the basis of those circumstances, along with the officers’ personal observations of the petitioner, the court was fully justified in holding that at the time the officers made the arrest ‘the facts and circumstances within their knowledge and of which they had reasonably trustworthy information were sufficient to warrant a *748prudent man in believing that the petitioner had committed or was committing an offense. . . ” (Citations omitted.) Id., 304-305; see also Draper v. United States, 358 U.S. 307, 312-14, 79 S. Ct. 329, 3 L. Ed. 2d 327 (1959) (information from a reliable informant verified by direct observation can give police probable cause to make warrantless arrest); United States v. James, 466 F.2d 475, 477 (D.C. Cir. 1972) (identifying information coupled with the arresting officer’s verification of this information is adequate probable cause for an arrest). In both McCray v. Illinois, supra, and Draper v. United States, supra, the court sanctioned the warrantless arrest made on the basis of information from confidential informants similar to the information provided by the informant in the present case.8
Here, the informant told the officers that he actually saw the defendant selling narcotics inside the bar. Furthermore, there was other corroboration of the informant’s tip. The bar where the defendant was seen selling drugs was known to the police as a place where drugs were frequently sold, and the defendant was known to the police as a narcotics dealer who had been arrested and convicted in the past for drug offenses. There was sufficient evidence before the officers to constitute probable cause, despite their lack of additional investigation.9 The following facts establish the basis *749on which the officers determined that the information was reliable: (1) the informant was known to Griswold; (2) the informant had given reliable information to Griswold leading to fifteen arrests for narcotics offenses in the past; (3) Griswold was aware that the defendant had been convicted of a narcotics offense in the past;10 and (4) Griswold knew that the Shark Club was a popular location for the sale of illegal narcotics. The following facts describe the factual basis of the informant’s knowledge: (1) the informant identified the defendant by name; (2) the informant witnessed the alleged narcotics sale firsthand; (3) the informant specified “dope and coke” as the exact narcotics that the defendant was selling; (4) both Griswold and the informant were familiar with the manner in which narcotics sales were carried out; and (5) the informant specified exactly where the officers could locate the defendant, and the defendant was, in fact, there.
The defendant stresses that the informant did not give the officers any of the “predicate facts” that formed the basis for his information, and therefore the officers lacked sufficient knowledge of the factual basis of his information. The defendant suggests that had the informant described the drugs, the identity of the purchasers, or where the defendant was seated in the bar, there would have been a sufficient basis to find probable cause. While such evidence may have made the state’s case for probable cause stronger, the absence of that evidence does not necessarily preclude a finding of probable cause under the “totality of the *750circumstances” analysis. In applying the “totality of the circumstances” analysis, the trial court is free to determine whether the officers had probable cause based not only on the facts available to the officers, but on reasonable inferences from those facts. Because both Griswold and the informant were familiar with narcotics transactions, it is a reasonable inference that when the informant told Griswold that he saw the defendant selling “dope and coke,” he was referring to cocaine and heroin. Since the informant was familiar with drug transactions, it is reasonable also to infer that he knew how narcotics were packaged and their appearance. Given the facts presented and the reasonable inferences they suggest, the trial court did not find probable cause on the sole basis of an uncorroborated statement of the confidential informant. There was corroborative evidence. We conclude that the court properly determined that probable cause existed under the totality of the circumstances.
The judgment is affirmed.
In this opinion Dupont, C. J., concurred.
General Statutes § 54-94a provides in pertinent part: “When a defendant, prior to the commencement of trial, enters a plea of nolo contendere conditional on the right to take an appeal from the court’s denial of the defendant’s motion to suppress evidence based on an unreasonable search or seizure . . . the defendant after the imposition of sentence may file an appeal within the time prescribed by law. The issue to be considered in such an appeal shall be limited to whether it was proper for the court to have denied the motion to suppress . . . .”
At the hearing, the state produced a detailed list kept by Griswold of persons arrested as a result of information provided by this informant on previous occasions. The list also included the date of each arrest and the offense on which each arrest was based. All of the arrests listed were for drug related offenses, and more than half were for the sale of illegal narcotics.
We note that “[a] formal arrest need not always chronologically precede the search in order for the search to be valid. Where there is probable cause to arrest, a search before an arrest is reasonable under the fourth amendment as long as the arrest and search and seizure are substantially contemporaneous, and are integral parts of the same incident. Rawlings v. Kentucky, 448 U.S. 98, 111, 100 S. Ct. 2556, 65 L. Ed. 2d 633 (1980); State v. Federici, 179 Conn. 46, 54-55, 425 A.2d 916 (1979).” State v. Kaplan, 20 Conn. App. 183, 188, 565 A.2d 11 (1989).
The text of Griswold’s affidavit of probable cause is as follows: “[0]n 5-23-90, at approximately 10:00 p.m. this Detective was contacted by a credible and reliable informant who stated the following. That Pedro Santiago was now inside the Shark Club, Main Street, Willimantic, CT, in possession of both heroin and cocaine, which he was selling inside the bar. That Pedro Santiago is known by this Detective, having arrested him numerous times in the past. That the informant further stated that he/she knew that the accused was in possession of heroin and cocaine because he/she had just been inside the said bar and had observed him selling the said drugs to persons inside the bar. That this Detective and Officer Kozikowski immediately drove to the Shark Club Bar. That this Detective had knowledge that numerous drug dealers in our area are selling their illegal drugs (heroin/cocaine) in the Shark Club and that Pedro Santiago, a convicted drug dealer is now on Parole in the State of Connecticut. That this Detective and Officer Kozikowski entered the said bar and located the accused at the bar. That this Detective searched the accused and found him in possession of 5 glassine packets of what field tested positive for heroin. The accused was arrested and taken to H.Q. That the accused stated that this Detective put the heroin in his pocket. (The 5 packets of heroin [were] found in the left inside pocket of the accused.) That at H.Q. this Detective checked the accused further and found 3 small plastic packets of what field tested positive for cocaine. The 3 packets of cocaine were found in the rear area inside the accused’s underwear. The accused again stated that the police put them there. The accused was arrested for possession of narcotics heroin/cocaine, 21a-279a. This report is the truth to the best of my knowledge and ability . . . .”
General Statutes § 54-If provides in pertinent part: “arrest without warrant. . . . (b) Members of . . . any local police department . . . shall arrest, without previous complaint or warrant, any person who the officer has reasonable grounds to believe has committed or is committing a felony.”
Because of the procedural posture of this case, our review cannot be based on Terry v. Ohio, 392 U.S. 1, 88 S. Ct. 1868, 20 L. Ed. 2d 889 (1968), and its progeny.
Although State v. Barton, 219 Conn. 529, 594 A.2d 917 (1991), had not yet been decided as of the trial court’s decision on the defendant’s motion to suppress, the state asserts in its brief that the trial court’s finding can be supported by the “totality of the circumstances” analysis of probable cause as adopted in State v. Barton, supra. In his reply brief, the defendant disputes this assertion. The present case must be decided under State v. Barton, supra, because it has been held that its principles have retroac*746tive effect. State v. Johnson, 219 Conn. 557, 594 A.2d 933 (1991); see State v. Ryerson, 201 Conn. 333, 340, 514 A.2d 337 (1986); State v. Anziano, 26 Conn. App. 667, 672, 603 A.2d 415 (1992); State v. Marsala, 26 Conn. App. 423, 424-25, 601 A.2d 542 (1992); State v. Payne, 25 Conn. App. 428, 431, 594 A.2d 1035 (1991).
We stress that the present case involves a confidential informant known to the police, not an unknown informant supplying an anonymous tip.
The dissenting opinion cites State v. Delmonaco, 194 Conn. 331, 481 A.2d 40, cert. denied, 469 U.S. 1036, 105 S. Ct. 511, 83 L. Ed. 2d 401 (1984), which was decided under the Aguilar-Spinelli framework as set forth in State v. Kimbro, 197 Conn. 219,496 A.2d 498 (1985). In State v. Delmonaco, supra, 340, our Supreme Court noted that if a judge authorized a search based on an affidavit that did not sufficiently state the informant’s “basis of knowledge,’ ’ the judge’s role as finder of probable cause would be usurped. It is clear that the judge is responsible for determining whether probable cause exists. In the present case, the affidavit was not wholly lacking facts that establish the informant’s basis of knowledge, and the concern of the court in State v. Delmonaco, supra, is not implicated.
“[EJarlier narcotics related convictions of the defendant can properly be considered when determining the reliability of an informant’s tip. [TJhe prior arrest record, pertaining as it did to the reputation of the defendant, clearly was a practical consideration of everyday life upon which an officer (or a magistrate) may properly rely in assessing the reliability of an informant’s tip. . . .” (Citations omitted; internal quotation marks omitted.) State v. Tulli, 14 Conn. App. 356, 361, 541 A.2d 515, cert. denied, 208 Conn. 809, 545 A.2d 1105 (1988).