Hours later, he was dead.
Fresno police say Justin was shot several times in an alleyway outside the party, where nearly 200 teens were in attendance.
"We just want people to come forward and say something. We don't want no type of revenge. We just want justice. We just want closure for our family."
Investigators say the shooting involved gang members. But, Justin's family denies those claims.
"I just don't believe it right now. It's like not true."
The 16-year-old's death is one in a string of unsolved murders that occurred in Fresno over the past three days.
Friday morning, police discovered the body of 74-year-old Luis Ruiz lying in an alley in Chinatown.
Then, Saturday afternoon, a man in his late teens or early twenties was beaten to death outside the Hmong Water Festival in Southwest Fresno.
Fresno's homicide rate is now at 25 for the year compared to just 12 during the same period last year. For Justin Kirsh's family those numbers are staggering.
They feel for others experiencing the same pain they are and hope this deadly trend doesn't continue. "It hurts for someone to just come and rob you of someone you love, just take em and you don't see it coming."
Fresno police estimate of the 25 murders, about 70-percent are gang related.
The department is still enforcing its gang crackdown operation, which started back in April after another deadly weekend.
