two neglectful parents who were incarcerated on and off throughout his childhood, Horner said. Williams was alternately raised by his grandfather and in the juvenile justice and foster care systems. He was nine when he committed his first burglary. He had been recently paroled from prison, for shooting at a man in Oakland, when he killed Alaysha.

It was right after his release that he promised his grandfather that he was going to turn his life around and stay away from firearms, Horner said.

“The truth is the defendant had many, many chances throughout his life,” the judge said. “He spurred and rejected them all, every single one of them.”

Horner described Williams on Wednesday as having an obsession with firearms, street justice, revenge and violence.

Incensed over a friend’s killing onJuly 17, 2013, a 22-year-old Williams grabbed two guns and a bulletproof vest to seek his revenge against the suspected killer by targeting the man’s children and their mother.

Those kids, a 7-year-old girl and a 5-year-old boy, were having a sleepover at their Wilson Avenue home with their grandmother and their friend Alaysha. Williams rang the doorbell with a gun pointed downward at the children’s level and waited. When the 7-year-old opened the door, he fired 13 rounds. Everyone was hit, but only Alaysha was killed.

An Oakland police officer’s personal recording device caught video of the chaotic aftermath of wounded children crying as the officer carried a dying Alaysha out of the apartment.

“Those images will perhaps stay with us forever. I know they will stay with me,” Horner