OAKLAND -- Her only son dead at the hand of an unknown assailant following a traffic accident last June, Maria Climaco, of Emeryville, is hoping a photo of the getaway car, an advertising campaign and a $100,000 reward will bring her justice.

Oakland police on Wednesday released a blurry photo of the silver four-door hatchback car with front-end damage they believe carried two suspects, one who shot and killed 22-year-old Aya Nakano, of Emeryville, June 12. The photo was taken from a video surveillance camera near the murder scene in front of a carwash on Market Street in Oakland near the corner of Stanford Avenue just before 11 p.m. that night.

Police say Nakano was driving a silver Jeep Cherokee on Market Street and was on his way home from playing basketball at UC Berkeley when he got into an accident with the suspects. He pulled his car to the side, got out of his Jeep, an argument ensued and one man in the silver car shot and killed him.

In addition to the $100,000 reward, Climaco is spending an additional $30,000 to buy advertising space on 45 bus stop benches, five billboards and space on 15 AC Transit buses all with a message about the crime, the reward and how to contact police.

Climaco said she hopes the $100,000 reward -- far above the usual amount ranging from $10,000 to $20,000 -- is enough to overcome any reticence a witness may have in coming forward.

"There might be someone out there who is totally destitute and needs the money, or an angry ex-girlfriend who has information," Climaco said. "It's a substantial amount of money. To people who know something about this, I'm asking them to do the right thing."

She said family and friends are willing to raise more money for a reward if they are not successful with the $100,000.

Connie Climaco, Nakano's aunt, said she likes to think the money would not be the only factor motivating witnesses to come forward.

"There has to be some goodness out there in society," she said. "Maybe it's not about the money. It's not like Aya's life is worth any amount of money."

Oakland police spokeswoman Johnna Watson said police know there were two suspects in the vehicle and that it probably has front-end damage. Although the Police Department obtained video footage from a camera near the accident, there is no video of the accident itself or the confrontation following it, she said.

"We don't have a license plate, and we don't have a driver, and we do not believe the car was stolen because its description didn't come up on any of our databases," Watson said. "We believe that car is still out there."

Anyone with information on the crime can call the Oakland police homicide division at 510-238-3821 or Crime Stoppers of Oakland at 510-777-8572 or send an email to helpaya@oaklandnet.com

Contact Doug Oakley at 925-234-1699. Follow him at Twitter.com/douglasoakley.