The toddler son of a California MMA fighter died on Sunday night after a suspected drunken driver struck the child as he sat in his stroller, FOX6 reported.

Liam Michael Kowal was declared brain dead on Sunday night and removed from life support. His dad, MMA fighter Marcus Kowal, said on Facebook that the 15-month-old boy’s organs would be donated. Donna Marie Higgins, 72, is accused of hitting Liam and a 15-year-old girl who was pushing his carriage in a Hawthorne crosswalk on Saturday afternoon. The teenage girl, who was not identified, had serious injuries but was in stable condition.

Police later arrested Higgins, who officials said fled the scene. She was charged with hit-and-run and DUI, and was held on $100,000 bail.

“About an hour ago, our baby was declared brain dead,” Marcus wrote in a Sunday night Facebook post. “He tried to fight so hard. He even died at one point but they brought him back. He's a little fighter. His heart is still beating but his brain is no longer working.”

Liam’s family asked the parents of any children who needed a donated organ to contact them.

“It hurts to write this, but Liam loved to share and the person we were going to raise him to be would love to help someone else,” Marcus wrote on Sunday.