The brutal murders of Robin Kaye, a music supervisor on "American Idol," and her husband, musician Thomas DeLuca, at their home in Encino earlier this week sent shockwaves through Los Angeles ... and we've learned the suspect,

A 22-year-old Los Angeles man is facing murder and burglary charges for the killing of a longtime American Idol staffer and her husband while allegedly attempting to rob their home in an upscale Los Angeles neighborhood last week.

Raymond Boodarian was arrested on July 15, a day after the bodies of American Idol's Robin Kaye and husband Thomas Deluca were found with fatal gunshot wounds in their Encino home.