TROY, Mich. -

As Troy police continue their investigation into the shooting death of a gas station clerk, they’re asking for two specific people to come forward.   

In a statement Monday, police said they are looking for individuals who made a prepaid gas purchase and a beverage purchase on Feb. 8 between 11 a.m. and 2 p.m. at the station, which is at the corner of South Boulevard and Rochester Road.

The clerk, 63-year-old Athir Putres, was found shot in the head that same afternoon.

Police have already released a sketch of a man they are calling a “suspect” in the slaying.

Read more: Police release sketch of gas station clerk murder suspect

He is described as a black man between 40 and 50 years old, standing about 5 feet 9 inches with a medium build and a mustache. He was last seen at the rear of the Clark gas station at the time of the shooting and he was wearing a light gray, mid-thigh length winter parka.

Police are also following up on a lead regarding a black Buick that was spotted near the gas station at the time of the shooting.

Anyone with information about this murder is asked to contact the Troy Police Department at 248-524-3477 or the Troy Police Anonymous Tip Line at 248-524-0777.