Convicted murderer Scott Peterson's time at Mule Creek State Prison outside Sacramento just got a little worse, after he reportedly got beaten up last week, and now we're hearing from the inmate who did the beating.

The incident got picked up by TMZ last week, and all we knew was that Scott Peterson had been injured in a prison fight of some kind. But the Chronicle got in touch with Charles Miles, 39-year-old the inmate accused of beating up Peterson, who is now 52.

Apparently Miles had been walking by along a recreation path and was unaware of a pickleball game going on nearby, or that an errant ball had just flown by him. He tells the Chronicle that he just saw an individual he didn't recognize charging toward him with a potential weapon — a pickleball paddle — and he turned and reacted with force.

"It just triggered a primal urge in me," Miles tells the Chronicle. "That’s when I just took fight on him, and I just beat the living fuck out of him."

Miles also says that he heard someone shout "Hey that's the baby killer!" but it's not clear if that happened before, during, or after the beating.

Miles is apparently god-fearing now, if still known to be violent in prison. He is from Richmond, and he was convicted in a 2007 gang-related murder in Pinole.

"God made this happen,” Miles told the Chronicle in his interview. "It was God’s plan for sure." He went on to explain that the beating took place in the same spot that he had stopped to pray earlier.

Miles is not up for parole until 2031, and Peterson continues to serve his life sentence for the Modesto murders of his wife Laci Peterson and their unborn son, around Christmas Eve in 2002.

Last year, the Los Angeles Innocence Project, which is unaffiliated by the national organization of the same name that seeks to exonerate conficted felons based on new evidence, took up Peterson's case and has been working to get him a new trial. While a host of circumstantial evidence, and some physical evidence, pointed to Peterson's guilt, family members of Peterson, a retired ABC News producer in LA named Mike Gudgell, and Peterson himself, have seized on several bits of evidence they want the court to look at — including a van that was set on fire near the Petersons' home around the time of the crime.

The case for Peterson's new trial is being argued in San Mateo County, where his original trial took place due to a change-of-venue, because of the high-profile nature of the case at the time.