Tim Wenkel, 34, was arrested at the school following a misdemeanor theft charge.
According to court documents, Wenkel stole various electronics, including video games, a Nintendo 3DS and various clothing from a car at the South Belt Walgreens.
The probable cause statement says Wenkel admitted he is an "alcoholic and he was driving under the influence of alcohol when the crime occurred."
A message was sent home to parents from the school informing them of the arrest.
Wenkel was hired as the new coach back in April replacing former head coach Steve Vertin.
Wenkel was released on a city summons with a court date scheduled for Friday.
Bishop LeBlond would not comment further on the case.