GLENDALE, AZ — Glendale police are investigating a homicide involving a man previously reported missing.

Authorities say the body found on Nov. 11 was that of 30-year-old Grant Siefert.

WATCH: Glendale Police Department officials provide updates on investigation

Just before 8 a.m. that day, Glendale police received reports that a body was found in the impoundment near 56th and Peoria streets. The body was later identified as Siefert.

The investigation is being treated as a homicide and investigators are asking for the public’s help with any information.

Police believe the suspect(s) were driving and possessing Grant’s black, four-door, 2011 Ford Escape with Arizona temporary license plate 392635U.

Missing from America Network, Glendale police

Grant was previously reported missing in Phoenix on November 10.

If anyone has information regarding the location of this vehicle or its occupants, please contact Glendale Police at 623-930-3000. It is also believed that Grant arrived in the area around 1 a.m. on the morning of November 11.^This. If anyone sees or hears anything, please contact the police.