RedactedNarrative: Witness from vessel #2 had made a distress call to report that he found an overturned vessel with debris and a deceased black and white Boston Terrier floating in the water near the mouth of the Clinton River.  There was also a medium sized lunch pail that was used as a tackle box.  He had recovered the dog and lunch pail at the request of the dispatcher.  Witness stated that he was heading to Markley Marine to have his vessel taken out of the water for the season, when he came upon the overturned vessel and floating debris.  He had stated that he observed another vessel in the area, but has no information on the second vessel.  He said that the dog and debris were floating south from the overturned vessel.  Witness used a legal pad and drew a brief sketch of his float plan and where he made contact with the overturned vessel. Deputies went to vessel #1 owners home and spoke with a girlfriend who advised officers that her boyfriend had gone out fishing for the day with their dog on the lake on his 12 foot boat and had not returned.  Based on the information we began a box grid pattern search in the area of the capsized vessel and were assisted by the CG.  No details were provided regarding finding the deceased.