RedactedNarrative: Vessel was anchored started taking in water from stern. Operator started vessel to pull anchor and vessel capsized. From the statements provided the vessel began taking in water over the transom. Subject activated the bilge pump manually but the vessel still began to fill with water. Subject then started the vessel and began to walk to the bow of the vessel to pull the anchor. The vessel stalled and began to take on more water from the stern. The vessel then rolled over and remained upside down. Based on witness statements and inspection of the vessel once on shore, I concluded that the vessel started taking on water and the bilge pump system was not functioning properly.