The Rock Island man who went missing in downtown Moline early Sunday and whose body was found in the Mississippi River three days later near Buffalo had drowned, according to results of an autopsy released Friday afternoon.

Moline police have no reason to believe foul play was involved in the drowning of David Harker, Detective Scott Williams said in a news release.

"The Moline Police Department wishes to thank the many volunteers for their outpouring of support for David’s family during the most difficult of times, and for their support of the search efforts by police," Williams said.

The autopsy was conducted Thursday at University Hospitals, Iowa City.

David's father, Dennis Harker, also posted Friday morning on Facebook that his son's death was an accidental drowning. 

"... The only injury on David was a small cut that was totally insignificant," the father wrote. "In my heart, I have to hope he did not know what happened and did not suffer."

Dennis Harker also wrote: "I hope David is somewhere where he can still feel my love."

About 300 people attended a vigil Wednesday night at Rock Island's Lincoln Park, near where Harker lived.

Friday night, Harker was remembered before the start of the Rock Island High School-Alleman football game. Harker was a 2003 Rocky graduate, and his wife, Kadie, is a 2004 Alleman graduate. A collection also was taken from the crowd to support the Harker family.

David Harker, a 28-year-old husband and father of two, was last seen leaving Twenty, a restaurant and bar in Moline, about 1:30 a.m. Sunday.

His family reported him missing later in the day, and for the next three days, hundreds of people became involved in search efforts.

His body was found Wednesday morning in the Mississippi River near Buffalo.

Williams said there is no way of knowing where Harker entered the river, except that it likely was below Lock & Dam 15, given the condition of the body.

The death was the second of its kind in the Quad-Cities in a month.

Flynn Schulz, 33, of Davenport, died Aug. 31 after apparently falling into the Mississippi River. He also had just left a bar and was walking home.

Friends said they think Schulz climbed onto a pier on the bike path where it connects to the viaduct, leading to the Rock Island Arsenal. The view of the river from that spot was a favorite of Schulz’s, and his friends had pictures of him sitting on the pier.

His body was found just below the pier in rocky, shallow water. Officials declined to perform an autopsy, saying they felt confident the popular runner and Iraq War veteran fell from the pier and was rendered unconscious by the large rocks below. He likely also drowned, they said.

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