As Michael exited his vehicle in downtown Clinton, the alleged shooter also got out of his auto and fired once at the officer before fleeing the scene and crashing his vehicle into an embankment about four blocks away, Lowe said.
Investigators have said that Michael was killed when the driver of a auto he stopped for a traffic violation in Clinton Sunday jumped out and shot him.
The Henry County prosecutor says that Noble knew the rifle was used in a crime and attempted to hide it.
Lowe could not specify how investigators came to find it.
William Noble, 35, has been charged with tampering with physical evidence in felony prosecution. Police asked him why he was fake crying and Noble allegedly told police he sold McCarthy the gun.
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Noble saw the safe was damaged, began acting "suspicious", and asked what type of gun was used in the murder. Police say they told Noble that he already knew the answer to that question.
Noble told the officers he "panicked" when he returned home on Monday - the day after the shooting - and found the rifle leaning against an inside doorway, the statement said. He was unarmed when taken into custody about 20 miles away from the murder scene, police said.
The Court has issued a warrant with a bond of $25,000 cash only.
The officers then asked Noble if he knew where the gun was.
Police say Noble took them to the intersection of NW 300th Road and NW 131st Road, north of the Clinton city limits. He said charges against other individuals could be announced as an investigation continues. Investigators believe McCarthy got out of his vehicle and shot at Officer Michael, killing him.
Ian McCarthy, the man with a long criminal history in New Hampshire who is accused of shooting to death a Clinton, Mo., police officer, will plead innocent to the charges today, according to his public defender.