It's a rare move and leaves Scott Dekraai likely facing eight consecutive life sentences.
During the first week of new hearings, two deputies caught in the middle refused to testify.
The snitch scandal has already upended more than a dozen Southern California murder cases.
A cache of newly unsealed documents point to a thriving informant system. Only the sheriff's office seems unconvinced.
A public defender has accused the county sheriff department of intentionally hiding and possibly destroying evidence.