MOBILE, Alabama -- Third Precinct Capt. DeWayne Hill retired Monday after an internal investigation revealed he spent nearly $300 using a debit card that came into the precinct, police said today.

The card did not belong to Hill and he did not have authorization to use it, police said.

Nonetheless, the Mobile Police Department's Internal Affairs Unit found that Hill activated the Visa debit card, which came to the precinct but belonged to a private citizen, Mobile Police Chief Micheal Williams said.

Hill was found guilty of conduct unbecoming of an officer, unlawful conduct and violation of the law enforcement code of ethics, all considered major violations, according to police.

It's unknown whether the victim will press charges against Hill, although he could face charges of fraudulent use of a credit card and theft.

Investigators found Hill used the debit card for less than a month between the end of August and late September. He charged $298.82 on it at ATMs and local stores.

"It doesn't make any sense," Williams said.

"You would think someone who's worked in service for more than 20 years -- been in crisis situations, life-threatening situations -- would have a better understanding of right and wrong."

Hill started work with the Mobile Police Department on April 20, 1992.

Williams expects that a new police captain will be at the helm of the Third Precinct by the end of the week. Until then, a lieutenant has stepped up to fill the role previouslyheld by Hill.

"[We're going] to make sure services continue for citizens in that precinct," Williams said.

The Third Precinct includes a chunk of Midtown encompassing nearly 50,000 residents, according to MPD. In 2009, officers reported they responded to nearly 50,000 calls for service in the precinct.

News broke on Nov. 7 that the Mobile Police Department was investigating one of their own.

Police said the investigation started in late September when a confidential informant tipped investigators off about Hill's use of the debit card.

Mayor Sam Jones said today his office has not gotten any information about the misconduct.