Kariann Riley says the past 11 months have been hell. Her 20-year-old son was shot to death while playing Pokémon Go on his phone. It happened August 6 of last year, around 10 p.m.
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"It's so important to our family to have closure, to find the person who shot my baby boy in the back and make it so he can't hurt anybody else," Kariann said.
Congresswoman Jackie Speier represents San Mateo County, where the Riley's live. On Monday, she announced the city of San Francisco is offering a $50,000 reward. The U.S. Park police are adding $10,000, combined with the $50,000 already put forth by the Riley family.
Park police asking people to be on the lookout for two cars in this flyer and a person matching the description of this sketch pic.twitter.com/l2n1uzF20s— Tiffany Wilson (@TWilsonTV) July 10, 2017
The $110,000 might be enough to tempt someone to talk. "We do know that money motivates people," Speier said.
There are also new clues. Park police said a 2006 to 2009 black Audi A3 SUV could be of interest. And the make of a white car previously believed to be a Toyota has been changed to a 2013 four-door Hyundai Sonata.
RELATED: Person of interest sought in death of man playing Pokemon Go in San Francisco
Investigators believe it was seen driving up and down nearby Van Ness Avenue around the time of the shooting.
Since the murder, officers have passed out flyers and released a sketch of the suspect. Now they're hoping for new leads.
"We've been living a nightmare every day," Kariann said.
Anyone with information is asked to call the U.S. Park Police Tip Line at (415) 561-5150 or Park Communications at (415) 561-5508. Those providing tips may remain anonymous.