An accused cop killer has also been accused of selling drugs and a gun to undercover officers.Motions filed Friday by Davon Lymon’s attorney say he sold heroin to federal agents on Sept. 11 and Oct. 2. During that second sale, Lymon is accused of selling a .22-caliber revolver to an undercover federal agent.The previously convicted felon was banned from having a gun, though investigators did not arrest him for either sale.In a separate incident, Lymon used a handgun to shoot Officer Daniel Webster during a traffic stop, police say. The 47-year-old officer died Oct. 9.Since he is a convicted felon, Lymon faces three charges from May, for firearm possession, and a fourth from the October shooting.But Lymon's lawyer says the earlier incidents have nothing to do with the Webster’s death, and he doesn't want Webster to be mentioned during those trials. The motion asks the judge to exclude the shooting from evidence because it is separate from the possession charge."The jury would be tempted to convict Mr. Lymon because he might be dangerous and because he has already been convicted in the press, and not based on whether or not the evidence proves he, being a felon, knowingly possessed a firearm,” it states.U.S. attorney Damon Martinez has two weeks to respond to the motion regarding evidence. Lymon's attorney will then get another week to reply before the judge makes a decision.