INDIANAPOLIS — Hundreds of mourners gathered at a ceremony beginning two days of memorial services for a police officer who was fatally shot while trying to help a man trapped inside an overturned car in Indianapolis.

Two honor guard officers stood at attention next to the flag-draped casket of Southport police Lt. Aaron Allan as a condolence letter from U.S. Attorney General Jeff Sessions was read at Friday’s start of visitation hours. Indianapolis Mayor Joe Hogsett then led a line of law-enforcement officials past the casket to speak with Allan’s wife and two sons.

Allan’s funeral will be Saturday at Banker’s Life Fieldhouse.

Authorities say Allan was trying to assist 28-year-old Jason Brown after a July 27 car crash when Brown suddenly became agitated and opened fire. Brown faces murder charges.