The State appeals a pretrial order which suppressed defendant's confession. We reverse.
Issue
Whether an accused person in custody, having once invoked the right to counsel, can thereafter constitutionally waive that right.
Facts
Around noon on May 27, 1977, following the robbery of a Renton jewelry store, defendant was arrested, frisked and orally advised of his constitutional rights. Defendant refused to answer any questions and stated he wanted to talk to "a lawyer" or "his lawyer."
Defendant was then transported to the Renton police station at about 12:10 p.m. The Renton police station is equipped with a booking facility and a jail. During the booking process, which took approximately 1 hour, defendant refused to state his name, address or date of birth and was booked as "John Doe." Subsequently defendant was permitted to place a telephone call to a lawyer. The defendant telephoned a friend instructing him to obtain a lawyer for him. The defendant was then placed in a cell at the jail for several hours and then brought to an interrogation room for questioning.
A Detective File and his partner were in the interrogation room when defendant was brought in. The defendant was again read his rights and thereafter defendant signed a waiver of rights form and made statements concerning the *666crime committed in Renton. Upon further questioning, defendant made an oral confession to the robbery of the Cascade Valley Hospital. (On May 3, 1977, the Cascade Valley Hospital had been robbed of a quantity of drugs by a masked person who escaped.) Detective File knew of the robbery of the hospital, but had been unaware of defendant's involvement.
On June 1, 1977, upon information from the Renton police, Officer Cull of the Snohomish County Sheriff's Office and another officer appearing in plain clothes, came to the jail in Renton for the purpose of questioning defendant concerning the Cascade Valley Hospital robbery. Defendant was again advised of his rights and he signed the appropriate acknowledgment of rights and waiver form. Thereafter, a written statement was obtained from defendant admitting his involvement in the Cascade Valley Hospital robbery. Defendant was subsequently charged with such robbery.
Following a hearing held pursuant to CrR 3.5 to suppress defendant's confession, the court entered the following findings as to undisputed facts:
Finding of fact No. 2:
At the time of apprehension on May 27, 1977, the defendant refused to answer any questions and indicated that he wanted to talk to "a lawyer" or "his lawyer". Detective Nibarger delivered defendant to- the Renton Police Station, where there is a booking facility and a jail, about 12:10 on that date. The booking process took about an hour, during which time the defendant refused to state his name or address or date of birth, among other things.
He did place a telephone call to a friend, with a request to obtain a lawyer.
Finding of fact No. 3:
The defendant was placed in a cell at the Renton Jail for two or three hours and then brought in to the interrogation room for questioning by Detective File and his partner. Detective File read him his rights form — or his partner did, and he signed the rights form, which is Exhibit 3, and then, subsequently, after questioning, *667made a statement concerning the crime committed in Renton.
Finding of fact No. 4:
After the taking of the above-mentioned statement, Detective File further questioned the defendant in general terms concerning his activities in the State of Washington, it being determined, apparently, that defendant was originally from California. The purpose of the questioning was to ascertain what his activities in this State, particularly King County, had been, and with the view in mind of clearing up any other criminal activity or cases that they might uncover from that conversation; and at least one such criminal case that was uncovered was the robbery of the pharmacy at Cascade Valley Hospital, in Snohomish County, of which Detective File had previously been aware, but he was not aware of anything concerning the defendant's involvement. The defendant did make an oral confession of perpetrating that offense. The Snohomish County Sheriff's Office was so advised; prior to said advisement, Snohomish County authorities had no information implicating defendant herein in the Cascade Valley Hospital Robbery.
Finding of fact No. 5:
On the thirty-first day of May, 1977, defendant was brought before Judge "Matson" at the District Court of Renton for arraignment on the charge of robbery in Renton. At that time, the defendant moved to be permitted to represent himself, and that motion was denied. The record is not clear as to whether the lawyer was appointed for him on that occasion.
Finding of fact No. 6:
The record is silent as to whether any officer ever made any attempt to ascertain whether or not defendant had in fact been able to contact an attorney.
From these findings, the court concluded:
That the defendant knowingly and voluntarily waived counsel in talking to Detective File (Renton Police Department) and Detective Cull (Snohomish County Sheriff's Office); but the surrounding circumstances, particularly the time elapsing between the defendant's refusal to talk without an attorney while being frisked at *668the scene of the crime and his statement to Detective File, (about four (4) hours), are not sufficiently strong in favor of the State for this court to rule in direct opposition to the rulings of the Court of Appeals, Division Two, as discussed in the Court's Memorandum Decision. Therefore, the statement of defendant of June 1, 1977 is found inadmissible and is suppressed.
Conclusion of law No. 1.
The trial court's ruling was based on a reading of State v. Boggs, 16 Wn. App. 682, 559 P.2d 11 (1977), and State v. Haynes, 16 Wm App. 778, 559 P.2d 583 (1977),-which the court interpreted as establishing a per se rule prohibiting a defendant, following an assertion of the right to counsel, from subsequently waiving that right. Under such a rule, any and all police interrogation following an assertion of the right to counsel would be prohibited. Thereafter the State moved for dismissal alleging that the practical effect of the suppression of the confession was to terminate the case. The State's motion was granted and this appeal followed.
Issue 1: No per se rule exists to prohibit a defendant from constitutionally waiving his prior asserted right to counsel.
A per se rule prohibiting a suspect in a criminal investigation from waiving his right to counsel after having initially made known his desire to have the assistance of counsel is neither necessary nor appropriate; Miranda requirements must be applied with flexibility and realism. United States v. Rodriguez-Gastelum, 569 F.2d 482 (9th Cir.), cert. denied, 436 U.S. 919 (1978); cf. North Carolina v. Butler, 441 U.S. 369, 60 L. Ed. 2d 286, 99 S. Ct. 1755 (1979).1
In North Carolina v. Butler, supra at 370, the United States Supreme Court rejected the North Carolina Supreme Court's per se rule "that Miranda v. Arizona, 384 *669U.S. 436, requires that no statement of a person under custodial interrogation may be admitted in evidence against him unless, at the time the statement was made, he explicitly waived the right to the presence of a lawyer." We hold that an accused, after asserting a right to counsel, can subsequently waive that right if he chooses, and if he voluntarily does so.
In North Carolina v. Butler, supra it was stated at pages 374-75:
Even when a right so fundamental as that to counsel at trial is involved, the question of waiver must be determined on "the particular facts and circumstances surrounding that case, including the background, experience, and conduct of the accused."
(Citations omitted.)
Under the heading "Conclusion of Law," the trial court made a factual statement "that defendant knowingly and voluntarily waived his right to counsel." A statement of fact included within a trial court's conclusions of law will be treated as a finding of fact by the reviewing court. Redmond v. Kezner, 10 Wn. App. 332, 517 P.2d 625 (1973). A finding of fact supported by substantial evidence will not be overturned on appeal. Thorndike v. Hesperian Orchards, Inc., 54 Wn.2d 570, 343 P.2d 183 (1959).
Defendant's testimony illustrates that he was extremely knowledgeable in the booking process and his rights, including the right to obtain an attorney.
Q You've been advised of your rights many times, haven't you?
A Yes, I have.
Q Approximately how many times?
A I have no idea.
Q Ten, twenty?
A Possibly.
Q And basically you understand those rights?
A Yes.
Q And at the time you were booked into the Renton Police Department, you didn't give them any information; isn't that correct? You, in fact, were booked as John Doe?
*670A Yes.
Q And so you exercised those rights, and even though you claim they did continue to question you, you didn't give them any answers; is that right?
A That's correct. Up until booking, you're talking about.
Q I'm talking about during the booking process, yes, or through that.
A Yes.
Q Did you attempt to contact an attorney?
A Yes, I asked my friend, that I called, to contact, keep calling until they got an attorney for me, because I knew I would only get one phone call.
Q All right. Had you been represented by a lawyer in a criminal case previously?
A Oh, yes.
Q Had any of these attorneys been public defenders or lawyers furnished to you by the — A Yes, they had.
Q —State?
A Some of them, uh-huh.
Also, the fact that defendant signed an express waiver of rights form "is usually strong proof of the validity of that waiver" even though such was neither "necessary or sufficient to establish waiver." North Carolina v. Butler, supra at 373.
We conclude that there was substantial evidence to support the trial court's finding "that defendant knowingly and voluntarily waived his right to counsel." We hold that defendant had a constitutional right to waive his right to counsel, which he did.
Reverse and remand for trial.
Williams, J., concurs.
The rationale of North Carolina v. Butler, supra, was not available to the trial court at the time of its ruling.