EAST GREENBUSH — A 22-year-old man who fired at least 28 shots at state police on a highway outside Albany remained in critical condition Monday afternoon, and police don’t expect him to survive.

Darrel Brown was the sole passenger in a taxi he hired to take him from Hartford, Conn., to the Albany area, police said. The cab was stopped for speeding on Interstate 90 near East Greenbush late Saturday afternoon. Brown opened fire with a semiautomatic assault rifle on the trooper who was interviewing the driver and him. After the trooper got himself and the driver to safety, more police came and Brown was shot multiple times.

The taxi, two trooper vehicles and two bystanders’ vehicles were struck by bullets, but no officers or bystanders were hit. The highway was closed for nearly eight hours as police investigated.

Maj. William Sprague of State Police Troop G on Monday afternoon said Brown had been arrested before, but he wouldn’t provide any more details. Police are working with authorities in Hartford. Police are also still working to determine why Brown was coming to the Albany area and whether he legally owned the weapon, said Sprague. Sprague said Brown ignored attempts by police to communicate with him during the shooting, but at one point shouted at police “Shoot me! Kill me!”

Brown was taken to Albany Medical Center Hospital where he was in a coma Monday.