BATON ROUGE, La. (AP) — East Baton Rouge Parish District Attorney Hillar Moore says his office will examine the about-face testimony of a key witness in a rapper's trial to see how it affects other murder cases involving that witness and other defendants.

Rapper "Lil Boosie" — Torence Hatch — was acquitted Friday of paying for Terry Boyd's death in 2009.

Nineteen-year-old Michael "Marlo Mike" Louding testified that he and Hatch had nothing to do with that killing or any other.

Moore tells The Advocate that the day Hatch's jury was seated, Louding said he would testify for Hatch. Until then, says Moore, he'd been considered the key prosecution witness.

Louding told investigators in 2010 that Hatch paid him to kill Boyd, and that he was involved in five other killings.