Detroit police on Monday arrested the woman suspected of firing a fatal gunshot into a retired General Motors employee, military veteran who served in Vietnam and former Detroit police reserve officer who was working at an O'Reilly Auto Parts store in Detroit.

Shawnta Sharee Anderson, 23, was discovered hiding out in a home on Colfax in Detroit, Commander Elaine Bryant said Monday night.

Bryant said a large number of citizen tips helped lead to Anderson being arrested "without incident."

A second suspected accomplice, Eboni Monae Mcewen-Ross, 28, remains at large.

Breaking News: Suspect #1 taken into custody in connection with the fatal shooting that occurred at O’Reilly Auto Parts on the city’s west side. Posted by Detroit Police Department on Monday, November 6, 2017

Detroit Police Chief James Craig, calling the crime "cowardly" and "senseless," said the victim, James Haller Jr., 69, was shot when he attempted to intervene in a robbery the two women were committing at the store the evening of Oct. 1.

Prior to the arrest of Anderson, Detroit police arrested another woman in connection with the shooting, but later released the suspect, stating she was not involved.

O'Reilly Auto Parts shooting suspect vehicle

The women are believed to have left the scene in a burgundy Chevrolet Suburban without a rear passenger-side window.

A $12,500 reward is being offered for information leading to the arrests of the suspects, including $10,000 from O'reilly Auto Parts and $2,500 from Crime Stoppers.