Parents had no idea that son had in bedroom 181 rounds of ammunition, assault rifles, 50 pounds of explosive chemicals, 2 shotguns, handgun, metal pipes, detonation wires.
The Bethesda teenager in whose home investigators found a cache of assault rifles and bombmaking materials was compiling a list of home addresses for teachers at his former high school, police said yesterday.

Police officials said it was unclear why Colin McKenzie-Gude, 18, was making the list of teachers from St. John's College High School, a private school in Northwest Washington from which he graduated this year.

Also yesterday, police said McKenzie-Gude's father, Joseph L. Gude, 62, was charged with buying guns for his son, including at least some guns that the teenager was too young to own legally. Authorities have not said what, if anything, they think McKenzie-Gude planned to do with the weapons.

McKenzie-Gude turned himself in yesterday afternoon at a Montgomery police station in Rockville. He was charged in a warrant with five counts of possession of a firearm or ammunition by a minor, possession of a destructive device and possession of explosive material, police said.