KTVU:
The letter comes in the same month that [a sheriff's deputy] shot and killed a couple in their Dublin home after he finished a double shift at Santa Rita Jail. He had been having a romantic relationship with the wife, who had been a nurse at the John George Psychiatric Center.
Four sources told KTVU that [the deputy] failed his psychological exam and because of liability issues, the sheriff is now auditing who else in the department might have also failed.
When asked if the audit was prompted by [the murder], [the sheriff's spokesperson] answered: "I'd have to say yes."