Hong, 41, was the apparent victim of a burglary attempt, police said.
"The victIm was a dear friend of mine, who was staying at my place while I was away. I am heartbroken. " Stroumboulopoulos wrote on Facebook. He said he was in New York at the time and is returning to Los Angeles.
Police found Hong's body after they responded to a 911 call around 2 a.m. Friday.
Witnesses saw a man dressed in a black jacket fleeing from the scene, according to LAPD Officer Jenny Houser.
