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Moline police searched a wooded area near the Rock River on Monday, hoping to find clues into a man's disappearance more than two decades ago.

Jerry Wolking of Moline was last seen about 11 p.m. Oct. 18, 1990. Police later found his bloodstained, abandoned vehicle at what is now the Quad-City International Airport.

Police suspected then that foul play may have been involved in his disappearance. Wolking was 52 when he disappeared. He would be 74 today.

For a few hours Monday afternoon, trained cadaver dogs sniffed in a wooded area across 60th Street from the Green Valley Sports Complex. Some trees were removed, and police used an excavator to dig for clues to Wolking's disappearance.

The missing man's son, Jerry Wolking Jr., showed up at the site and was escorted into the wooded area by law enforcement officers. He declined comment afterward.

"Nothing found today," Moline police Capt. Trevor Fisk said as he and others walked out of the woods at the end of the day's search.

Fisk said police are expected to return today to continue searching in the same general area, although in a different location. He added that police are at the "mercy" of the cadaver dogs, which are trained to detect human remains.