From Provincetown Police:
We are grateful for all the photos and information we have received from the community. With your support our officers were able to identify and arrest a suspect in this case. Aaron Mrowka, 29 year old resident of Provincetown is under arrest and will be arraigned by the Orleans District Court later today. He is being charged with Assault with intent to Murder and Aggravated Assault and Battery on a Person Over Sixty. We thank everyone for their help and support and again we are confident that there is no ongoing threat to the community.