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,

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.

"American Idol" music supervisor Robin Kaye, who was shot dead, worked on other competition shows including "Lip Sync Battle" and "The Singing Bee."