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Kelly said they are investigating a motive in the shooting and the relationship between Williams and the victims.

\"There is connectivity between Mr. Williams and the victims,\" he said.

Williams has worked for the sheriff's office for a year, according to Kelly. Prior to applying to be a sheriff's deputy, he was going through a field training officer program in Stockton upon graduating from the police academy, Kelly said. Williams did not pass his probation to become a solo police officer and was let go, he said.

\"PHOTO:
Alameda County Sheriffs Office
PHOTO: Alameda County Sheriff's Office deputy Devin Williams Jr. in a photo released by police.
>

\"A lot of those issues that we found were related to his skillset and his ability to effectively do the job,\" Kelly said. \"They were not based on any type of conduct. It was more of his ability and skillset wasn't meeting the criteria that this job demands. And so at that point, they let him go. That's not uncommon.\"

Williams was considered a \"very good candidate\" for law enforcement, said Kelly, who noted that the agency is \"in shock.\"

\"Somewhere in the last several months of his life, some significant events happened that led up to this moment. A lot of those events went undiscovered and disclosed. And we're gonna be looking into that,\" Kelly said. \"I think there's a lot of questions that need to be answered.\"

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