Associated Press - November 3, 2009 1:05 PM ET

ALBUQUERQUE, N.M. (AP) - A man arrested in Colorado is suspected of raping 11 women in New Mexico and Texas over a 15-year span.

He's also accused -- more recently, trying to kill a Colorado police officer.

Authorities in Albuquerque and Pueblo, Colo., are checking to see if 47-year-old Robert Howard Bruce of Pueblo, might have been involved in other unsolved crimes.

Bruce, dubbed "Ether Man" in Albuquerque, was tied to the rapes in New Mexico's largest city dating to 1991 after his DNA matched one case.

Police think Bruce may have committed crimes from 1991 to 2000 in Albuquerque and a 2006 rape in Austin, Texas. Bruce lived in Albuquerque, Rio Rancho and Raton from 1988 to 2003.

Police say Bruce is also suspected in three rapes in Lubbock, Texas, in 2005 because of similarities with cases in New Mexico.

Copyright 2009 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.