R.C. Jenkins, 29, a black man, was stabbed multiple times at 17818 Lakespring Ave. in the Lake Los Angeles area about 11 p.m. Thursday, Feb. 21.
According to authorities, Jenkins was accompanying his friend, Willie Nathaniel Cayne, 19, to confront his ex-girlfriend's new boyfriend. At the house, the men knocked on the door, then rushed in and attacked the woman's boyfriend.
Jenkins was stabbed multiple times during the fight, according to the L.A. County Sheriff's Department. He was pronounced dead at 11:33 p.m. by paramedics at the scene.
Cayne was arrested at the home by sheriff's deputies from the Palmdale station. The woman's boyfriend was treated at the scene, but his condition was unknown.