DETROIT (WWJ/AP) – Authorities say a man’s body found in the Detroit River has been identified as that man missing for several days after he fell off a boat. reports the Wayne County Medical Examiner’s office has determined the deceased man is 44-year-old Antonio McKelton.

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McKelton had been watching a concert from a 33-foot boat near the amphitheater at Detroit’s Chene Park, family members said, when he fell overboard into the river at around 1:30 a.m. Thursday.  They did throw him a life jacket but eventually lost sight of him and feared the worst.

U.S. Coast Guard Cmdr. Austin Ives told Fox 2 News that, even though McKelton knew how to swim, it was likely that the current was just too strong.

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An intensive search using boat, helicopter and sonar stretched 286 nautical miles, but rescue crews weren’t able to find him.

The U.S. Coast Guard says the body was found Sunday morning. Alcohol was not a factor, officials said.

The Chene Park show featured Avery Sunshine as well as the duo Kindred the Family Soul.

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