Some things to consider:
Sheriff Arpaio’s Deputies are career Law Enforcement professionals whose reputations depend on their veracity. It cost the Sheriff’s Office a considerable amount of money to train these guys in Computer Forensics and even more to task them with this assignment. I suppose it’s a matter of who you’re willing to believe; people whose job it is to ferret-out crime or people who are habitual liars?
Sure, but it doesn’t look like any of his professional LEO’s had any involvment in this particular cold case posse investigation.