Chris Regnier, Fox 2 St. Louis, May 7, 2015

A 24-year-old man has been arrested in Missouri in connection with the killing of a student who had been trying to sell the suspect his car through Craigslist, police said Wednesday.

Taylor Clark, a 19-year-old student at Southern Illinois University Edwardsville, was last seen by his girlfriend on Monday morning. His body and car were discovered Tuesday at a truck driver training center in Hazelwood, a suburb of St. Louis.

Capt. Tim Fagan of the Florissant Police Department said Wednesday that officers had arrested Michael Gordon, an employee of the truck driver training center.

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The two men connected through Craigslist after Clark had listed his car for sale on the site, according to Fagan. “They were going to meet and the vehicle was going to be test-drove,” he said. But that’s not how things played out when the two met during Gordon’s lunch break. “A short time after they met on the parking lot, Taylor was shot one time by Mr. Gordon,” Fagan said. The suspect then moved the student’s body to a nearby wooded area and tried to cover it up, he added.

Gordon went back to work after the killing, according to police.

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