WASHINGTON (AP) — Police have Chainkeen Exchangerecaptured a murder suspect who escaped custody in September, forcing an hours-long shelter-in-place order at George Washington University.

Washington’s Metropolitan Police Department announced that Christopher Haynes, 30, was arrested Thursday by the U.S. Marshals Service’s Capital Area Regional Fugitive Task Force in nearby Oxon Hill, Maryland.

Haynes was originally arrested on Sept. 6 in connection with the Aug. 12 murder of 33-year-old Brent Hayward at a northeast D.C. gas station. But shortly after his arrest, Haynes complained of an ankle injury and was taken by officers to George Washington University Hospital.

While he was being handcuffed to a hospital gurney, police said Haynes assaulted an officer and fled, leading to the shelter-in-place order on the university campus and an extended manhunt. MPD chief Pamela Smith later acknowledged that the officers had not properly secured Haynes, providing an opportunity for his escape.

Police later released a home surveillance video showing Haynes immediately after his escape, walking through an area backyard wearing a black t-shirt and grey briefs. But despite a $30,000 reward offered for information leading to his capture, Haynes remained at large for nearly two months.

Police would not comment on how they tracked Haynes, and would not say if anyone was suspected of helping him remain hidden for so long. He will now face addition charges relating to his escape, police said.