Loved ones gathered at Dolores Park on Saturday to share memories of 19-year-old Luis Manuel Arguello-Inglis.
Police say he was shot multiple times Wednesday night.
Arguello-Inglis was a Lowell High School graduate and San Jose State University student.
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His family says he had just received his certificate to be an EMT and had ambitions of becoming a firefighter.
"Every morning I wake up since he hasn't been here, it's the most pain I've ever felt. I would say that I wish it was me, but I wouldn't want him to feel all this pain," said Natalia Arguello.
There has been no word on any arrests or a motive in the shooting.
The family of started a GoFundMe page, saying in part, "Luis was a bright light in our lives, filled with love, laughter, and boundless potential. His loss has left a void in our hearts that can never be filled."