The Bexar County Sheriff's Office in San Antonio on Thursday announced Deputy Steve Benoy has been placed on 10 days of administrative leave.
The deaths are under investigation. Names of the two Belgian Malinois law enforcement dogs haven't been released.
Officials say Benoy discovered the dead animals Wednesday in their kennels inside a county-owned SUV at his residence.
Authorities believe the deputy drove home and parked that vehicle Tuesday, then went out for the evening. He allegedly forgot to place the dogs in their regular quarters at his residence.
Records show Benoy has been with the sheriff's office for 23 years and has never been disciplined.