RedactedNarrative: Vessel was tied to the houseboat for the night. The vessel was tied on the port side to the port side of the houseboat with the bow of the vessel facing out toward open water. At some point during the night the vessel began to take on water. When Subject noticed the boat the next morning at 7 am the boat was completely full of water with the engine partially submerged. Subject stated that the drain plug was in the boat. By the time I arrived the water had been pumped out of the boat and they were towing to Holly Creek Marina to take it to a shop.