Bill Lee, Sanford, Fla. police chief during the Trayvon Martin shooting, set to resign Monday, source says

(CBS) Sanford, Florida Police Chief Bill Lee, who temporarily stepped down from his position in the wake of the Trayvon Martin shooting, will officially resign on Monday afternoon, a source within the Sanford Police Department told CBS News.

Pictures: George Zimmerman charged with murder

The Sanford City Commissioners' Office said in a news release Monday that they would vote at a meeting later in the day to approve Lee's resignation.

According to CBS affiliate WKMG, Sanford Mayor Jeff Triplett has called a special meeting with city commissioners at 4 p.m. A public notice for the meeting only stated commissioners would consider adoption of a "resolution relating to the police department."

Lee temporarily stepped down March 22 following the public outcry after his department declined to arrest George Zimmerman, the neighborhood watch volunteer who confessed to fatally shooting of 17-year-old Trayvon Martin in what he claimed was self-defense. Capt. Darren Scott has been serving as acting police chief, according to WKMG.

Zimmerman is charged with second-degree murder in Martin's death and was released from jail early Monday on $150,000 bail.

A source within the Sanford Police Department said one of the acting chiefs may offer his resignation today as well.

Complete coverage of the Trayvon Martin case on CBS News