"He was planning on going to the Marines. He was a good football player. He got some scholarships to go to EL Camino College and West L.A. College, but he didn't make it," said the victim's father.
Castillo was found dead at about 5 a.m. Sunday in the 1300 block of 16th Street.
Watch the video above for the complete report from Mayde Gomez.