Due to a dispatch error, Grand Prairie police went to the wrong home while responding to a 911 call and shot a man who wasn't involved in the reported disturbance, according to a statement from the department.

Police say the man – later identified as Thomas Simpson – exited his garage, assumed an aggressive stance, and pointed a gun at officers before being shot.

Simpson told CBS News Texas he was shot by police after opening his garage door, believing he was confronting burglars – only to discover officers had mistakenly arrived at his home due to a 911 dispatch error.

Police misdirected, resident shot

Officers responded around 1:45 a.m. Friday to the 3000 block of Holly Hill Drive.

According to the Grand Prairie Police Department, the error occurred when the 911 caller's cellphone address was incorrectly auto-populated in the dispatch system, sending officers to a neighbor's home instead of the caller's.

Police say they knocked on the door for about five minutes in a well-lit area. When Simpson emerged, officers, fearing for their lives, shot the resident in the leg.

Man treated and released

According to Grand Prairie police, Simpson walked unassisted to an ambulance, received first aid, and was treated and released at a local hospital.

Possible charges and investigations underway

Simpson could face charges, according to police.

"A case of aggravated assault with a deadly weapon against a peace officer will be referred to the Dallas County District Attorney's Office," Grand Prairie police said in a news release.

The Dallas County DA's Officer-Involved Shooting Team is conducting an independent investigation. The Grand Prairie Police Department's Office of Professional Standards is conducting a concurrent administrative investigation.

More details to come

CBS News Texas will provide additional information as more details become available.