Homicide detectives determined Leon was approached by a man toward the end of the party and was asked for his gang affiliation. Leon had no known gang ties, according to detectives. The unidentified man then pulled out a gun and shot Leon, then left the scene.
The suspect was described as a Hispanic man between 18 and 25 years old, wearing dark clothing.
Anyone with information related to the case was asked to call LAPD Foothill Division Homicide detectives at (818) 834-3115, or call (877) LAPD-24-7.
Tipsters may also contact Crimestoppers by texting to phone number 274637 (C-R-I-M-E-S on most keypads) with a cell phone. All text messages should begin with the letters "LAPD." Tipsters may also go to LAPDOnline.org, click on "webtips" and follow the prompts.