Ranger Sam Martinsen was patrolling Outer Cove Marina on the morning of September 12th when he came upon a vehicle being driven by a man â Prisco Ongrung â who was known not to have a valid license, as heâd received numerous warnings and three violation notices during the previous six months for the same infraction. Martinsen stopped Ongrung and was in the process of writing him another violation notice when Ongrung began walking away and towards his boat. Martinsen ordered him to stop, but he kept going. Martinsen then attempted to stop Ongrung by getting in front of him and placing his forearm against him. Ongrung responded by hitting Martinsen in the face, lacerating his lower lip. He was placed under arrest with the help of park maintenance employees who were in the area. Earlier this week, Ongrung appeared at a change of plea hearing in federal district court and pled guilty to assault on a federal officer. In exchange for Ongrung's guilty plea, the federal government will recommend that the court impose a term of imprisonment not to exceed the statutory maximum of 12 months. Ongrung is facing a maximum penalty of one year imprisonment and one year of supervised release.