Rockville, Md. ? Wild-eyed and sometimes shouting in his closing argument, John Allen Muhammad said Friday that he had been framed for the Washington area sniper slayings, alleging faked evidence ranging from DNA and ballistic tests to maps on his laptop computer that marked shooting scenes with skull-and-crossbones icons.

“They are just nothing but hackers. They just happen to work for the FBI or the CIA,” Muhammad said of investigators who examined the computer. They were just a few of the people Muhammad accused of lying in a rambling, three-hour-and-20-minute statement.

Montgomery County Circuit Judge James Ryan frequently cut Muhammad short, upholding prosecution objections that he was straying from the evidence.

Muhammad defended himself in his murder trial for six Maryland slayings, part of the October 2002 sniper shootings that terrified the region.