A Dunkirk, New York man is being investigated on felony charges, and is also discovered to be behind a home invasion and robbery. Dunkirk police say 25 year old Jonathan Davis forced his way into a home on South Roberts Road. He allegedly held the owner at knife-point and stole items from the house. Davis left, and the people inside the home were not injured. Davis is facing charges for that incident, and for the assault on an elderly man and police officer at a Family Dollar store on 4th Street in Dunkirk.