What is the test for coercive police tactics?

" In assessing allegedly coercive police tactics, "[t]he courts have prohibited only those psychological ploys which, under all the circumstances, are so coercive that they tend to produce a statement that is both involuntary and unreliable." " ( People v. Williams , supra , 49 Cal.4th at p. 436, 111 Cal.Rptr.3d 589, 233 P.3d 1000.) As the trial court found, there was nothing coercive about the detectives briefand accurateacknowledgment that the death penalty was a potential punishment for the crimes with which defendant was charged, and it does not appear that the mention of the death penalty prompted defendants confession. Nor is urging a defendant to tell his story before matters go any further an impermissible law enforcement tactic. ( Id. at pp. 438439, 443, 111 Cal.Rptr.3d 589, 233 P.3d 1000 ; Carrington , supra , 47 Cal.4th at p. 171, 97 Cal.Rptr.3d 117, 211 P.3d 617.)