RedactedNarrative: On the date and time stated, I responded to a boating accident on the Mobile River.  Vessel #1 was tied to the bank while the owner/occupants were out hunting on land.  A passing vessel (vessel #2 with an unknown registration and operator) caused an extremely large wake that swamped vessel #1 causing property damage/loss.  There was video of vessel #2, but the video was very poor quality making it difficult to make out any very specific details about vessel #2.  I contacted Dog River Marina in Mobile to check to see if a vessel fitting the description of vessel #2 had stopped there to get fuel and there was no such vessel.  I also called the lock north of were the accident occurred but could not get an answer.