Authorities have issued seven search warrants and interviewed numerous people to try to determine the motive of a man who took six girls hostage in a Park County school last month, killing one before shooting himself.
Colorado Bureau of Investigation division director Steve Johnson says after interviewing relatives of 53-year-old drifter Duane Morrison, authorities believe he acted completely alone. Johnson says Morrison's relatives have been cooperative.
Johnson says the search warrants are sealed, and he can't discuss any details of them.
Morrison invaded Platte Canyon High School on September 27th and fatally shot 16-year-old Emily Keyes after SWAT officers broke into a classroom. SWAT officers hit him with three shots, but authorities say Morrison shot himself to death.
The school -- and the adjoining Fitzsimmons Middle School -- resumed a normal class schedule last Thursday -- just over a week after the shooting.
(Copyright 2006 by The Associated Press. All Rights Reserved.)