LAKELAND, Fla. -- A man who police say bought a gun more than 20 years ago that was used last month in a fatal Alabama university rampage is declining to comment on his role.

Donald Proulx e-mailed The Associated Press on Wednesday to say he had been told not to discuss the matter. He referred questions to law enforcement.

A police investigator told an Alabama court Tuesday that the gun was bought by Proulx in New Hampshire in 1989 for the husband of the woman charged in the Alabama shooting. The investigator said the husband, James Anderson, wanted the gun because of problems with a neighbor.

Former professor Amy Bishop is charged with capital murder in the shooting at the University of Alabama Huntsville that left three people dead and three wounded.