PHOENIX (AP) — Maricopa County Sheriff Joe Arpaio refused during a recent deposition to accept responsibility for bringing a failed animal cruelty case against the college-age son of U.S. Sen. Jeff Flake.

Austin Flake alleges in a lawsuit that Arpaio trumped up animal cruelty charges against him over the heat-exhaustion deaths of 21 dogs at a kennel operated by his in-laws.

Flake and his then-wife were in charge of the dogs while the in-laws were out of town.

The in-laws initially said the animals died after a dog chewed through an air conditioning wire.

An expert later determined the AC unit failed because it wasn’t properly maintained.

Charges against the couple were dropped.

A copy of the July 14 depositions was publicly released this week by Flake’s lawyer.