Surveillance footage of Nikhom Thephakaysone. Photo courtesy of the San Francisco Police Department.

SAN FRANCISCO—The San Francisco Police Department (SFPD) arrested a man suspected of killing Justin Valdez, a San Francisco State University (SFSU) student, on September 23. Nikhom Thephakaysone, 30, was arrested at his home on September 24.

Surveillance video showsValdez, 20, getting shot from behind after getting off an eastbound M-Ocean View Muni train at the corner of Randolph and Bright Streets around 9:50 p.m., according to Sgt. Danielle Newman.

Police believe the shooting may have been random, as there appears to be no connection between Valdez and Thephakaysone.

Valdezwas a member of the water polo team at SFSU and is remembered for starting a “Lights Out Wednesday” program to reduce the carbon footprint at his high school in Garden Grove.

“This is truly a tragedy for Justin’s friends and family, and for the entire University community,” said Les Wong, SFSU president, in a statement. “I have reached out to Justin’s family to offer our heartfelt concern, and to assure them that we stand ready to offer support and assistance at this difficult time,” she added.

There will be two vigils forValdezon the pool deck at Garden Grove High School on September 27 at 7 p.m. and September 29 at 5:30 p.m., according to the event page on Facebook. The vigils are being held to celebrate Valdez’ life and share memories.

Viv, one of the organizers of the vigils, posted the following on the event page: “Thank you Justin for showing us what it’s like to know someone truly amazing and inspirational. You’ve changed this world for the better in the short amount of time you were here. You’re forever in our hearts. We love you.”

Rachel Kang, posted on the event page that her heart breaks with every post written inValdez’ memory.

“My deepest condolences, prayers and blessings are sent to his family and close friends,” Kang wrote. “There are no words to comply the loss of a gorgeous soul, one that had obviously deeply touched every being that he’s ever encountered. Rest in paradise Justin, I hope the air is cleaner up there,” she added.

Thephakaysone has been charged with homicide and was booked at the San Francisco County Jail. The shooting is still under investigation.

By Melissa Simon