Mark Porter, 53, is charged with two counts of first degree murder in the deaths of Gary and Jan Tyrrell.
Their bodies were found in their home in Springfield, after a relative was unable to reach them.
Porter entered a plea of not guilty before a Greene County judge Monday morning. He is being held without bond and is to be back in court September 5 for a hearing about his attorney.
For several months, police reported no developments in the murder investigation.
But according to the police probable cause statement (above), released Friday, DNA from a latex glove at the murder scene was matched to Porter.
Gary Tyrrell was known to be an avid coin collector. According to the probable cause statement, police did not find any sign of forced entry to the Tyrrell home. A walk-in safe in the garage appeared to have scratch marks on it, like someone tried to break in.
While interviewing family members of the Tyrrells, police learned that Mark Porter was a close friend. The PC statement shows Porter had asked Gary Tyrrell for $250,000. Tyrrell did not give Porter the money. Police later learned that Porter recently had sold silver coins for $18,531.40.
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