Fairfield police are asking for the public’s help as they search for a gunman in the shooting death of one person and wounding of three others at a high school graduation ceremony.

Police are looking for cell phone photographs or video recordings, dash camera footage, residential or business surveillance video, doorbell camera recordings and any details related to the shooting about 7:15 p.m. Wednesday in a parking lot of Fairfield High School following commencement for Sem Yeto Continuation High School.

“Even if you’re unsure whether the information you have is significant, please share it,” the department said on social media. “Details that may seem minor could be the key to solving this case.”

The email juneincidenttips@fairfield.ca.gov has been set up to receive tips and video related to the shooting. Investigators have no description of a suspect, Public Information Officer Michelle Belyea said Friday.

The appeal for help comes one day after police responded to criticism over the apparent lack of police presence at the graduation ceremony.

On Thursday, the department said an attempt to ask for police help was submitted for the Sem Yeto graduation but wasn’t made through established channels and the department wasn’t aware it.

The shooting killed an 18-year-old man. Belyea said the three surviving victims — ages 11, 20 and 25 — were in stable condition as of Friday afternoon. Police have said there is no ongoing threat to the community.

Nikila Walker Gibson, president of the Tri-City NAACP, which serves Fairfield, said the shooting was “a trauma.” She has four school-aged children in Fairfield and has had multiple discussions on gun violence and safety in the past few days.

“When things happen in the community, it doesn’t just affect the individuals involved, it affects the neighbors and teachers , especially when it’s a young person,” Gibson said.

The shooting is the second case to rock the small Bay Area city in recent weeks following viral videos of 16-year-old Fairfield High School student Maurice Williams being struck repeatedly by a Fairfield police officer on May 20.