A grieving SoCal mother says the killer of her 14-year-old son will go free – thanks to a woke criminal justice law backed by Gov. Gavin Newsom. Maria Gill, whose football star son Jeremy Rosales, nicknamed “Tank,” was gunned down near the family’s Victorville home in January, told The Post that one of her boy’s alleged assailants, aged 16, will be released by the time he’s 25 under California’s Proposition 57 .  “Proposition 57 –that’s all Gavin Newsom,” said Gill, a retail worker who last saw her son on the morning of Jan. 16, the day he was shot and killed . “It’s affecting us victims and families.” Jeremy Rosales was nicknamed “Tank.” Dignity Memorial He was his mom Maria’s youngest child and only son. Dignity Memorial Maria Gill wants justice for her son by reforming Prop. 57. Dignity Memorial Backed by then-Lt. Gov. Newsom and signed into law in 2018 by then-Gov.…