A 24-year-old drifter has been charged with at least 11 armed robberies in the Maryland suburbs during the past two months in what police are calling a "one-man crime wave."

David Gerard Knight, a Baltimore native who has no fixed address, was arrested at a Howard County motel by Laurel police Wednesday evening on an outstanding warrant for an armed robbery there.

He was charged with four other armed robberies that night after questioning by Prince George's County police.

The following day, Greenbelt police charged Knight with two armed robberies, and Laurel police charged him in arrest warrants for four other armed robberies.

"He's been busy," said Greenbelt Police Det. Doug Sappington.

Prince George's County police spokesman Bruce Gentile said that Knight also is being investigated in connection with a number of robberies in Montgomery, Fairfax and Anne Arundel counties.

Police did not release details on the amounts taken during any of the robberies.

Knight was released from the Maryland state prison in Hagerstown in December.

He had served 2 1/2 years of a five-year sentence for larceny and violation of probation, according to the State Division of Correction.

He is being held without bond at the Prince George's County Detention Center.

The robberies in which Knight has been charged are:

Prince George's County: Town Center Twin Theaters, Laurel, March 5; Best Western Motel, College Park, March 8; Kemp Mill Records, Fort Meade, March 25, and Party Palace, Beltsville, April 4.

Greenbelt: Shoetown, April 1, and Curiosity Shoppe, April 8.

Laurel: Stage One Video, April 8; Cheese Shop, Feb. 16; TRS Cleaners, March 7; High's Dairy Store, Main Street, March 11, and Wild & Wooly Needlecrafts, April 3.