The motion judge now has provided the missing piece of the puzzle. The judge specifically found that “Detective Cutillo first observed the *937Lincoln while standing on the comer of Garfield Avenue.” In our earlier analysis of circumstances presented here (see Commonwealth v. Jones, 375 Mass. 349, 354 [1978]), we reasoned that “[c]ertainly, sighting the Lincoln coming from the direction which the four men and Zalenda had taken on foot, viewed in the context of a simultaneous shout — ‘They got guns’ — and a subsequent check of the area to make sure the four men were not still on foot, could reasonably be said to warrant Detective Cutillo’s ‘guess[2] that the car probably contained the four men and should, therefore, be followed.” 17 Mass. App. Ct. at 522. See and compare Commonwealth v. Johnson, 6 Mass. App. Ct. 944, 945-946 (1978); Commonwealth v. Tosi, 14 Mass. App. Ct. 1029, 1029-1030 (1982). As the particular testimony to be considered on remand was found by the motion judge to be true, we have no choice but to conclude that the motion judge erred in allowing the motion to suppress. See Commonwealth v. Moon, 380 Mass. 751, 756 (1980); Commonwealth v. Spagnolo, 17 Mass. App. Ct. at 517.
Thomas J. Mundy, Jr., Assistant District Attorney, for the Commonwealth. Henry D. Katz for the defendants.Order allowing motion to suppress reversed.
“The choice of the word — guess — is not dispositive. The task for the court is to determine the underlying basis of the officer’s decision. A mere ‘hunch’ is constitutionally invalid, but reasonable ‘inferences’ and rational deductions therefrom may yield a ‘particularized suspicion’ in the total circumstances” (citations omitted). Commonwealth v. Spagnolo, 17 Mass. App. Ct. at 522 n.7.