MacKlem

A jury convicted 18-year-old defendant Grant Macklem of first degree murder in the death of his 17-year-old ex-girlfriend Sarah Beagles, and also of a charge of assault with a deadly weapon (plastic pipe) arising out of a jailhouse attack on Ray Doane, with whom Macklem was incarcerated pending trial on the Beagles matter. (Count 1, Pen. Code, § 187, subd. (a); count 5, § 245, subd.. (a)(1).) Other charges arising on the day of the murder (forcible sex offenses) were dismissed during trial for insufficient evidence, on a defense motion (§ 1118.1). The jury could not reach a verdict on an attempted murder charge regarding cellmate Doane, resulting in a mistrial on that charge. (§§ 664, 187, subd. (a).)

The trial court sentenced appellant to state prison for 25 years to life on count 1 and a consecutive four-year term on count" 5, and struck the weapon enhancement. The court awarded Macklem 616 days of custody credit.

On appeal, Macklem contends the trial court prejudicially erred in denying his motion to suppress incriminating statements he made during an interview with a detentions unit detective who told him she was investigating the Doane assault incident that took…