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COLLINSVILLE, Ill. (KSDK) – A fourth man has been charged in a string of Metro East armed robberies stemming from postings on online classified site Craigslist.

Desmund Marshall, 20, has been charged with one count of armed robbery and is currently being held on a $500,000 bond. The charges come six days after he and three 17-year-old suspects were arrested in connection with the robberies.

The four men are accused of using Craigslist to lure unsuspecting victims on Dec. 15, 17 and 22.During the first two robberies, victims were attacked with a baseball bat after answering ads for a television. While the first victim escaped without having anything stolen, the second victim was robbed of cash.

The third victim agreed to meet a person claiming to be selling a television in front of an apartment complex in the 200 block of Sandridge Drive on Dec. 22. When he got out of his car, the perpetrator allegedly pulled out a gun and demanded money.

The victim left the area uninjured, but not before he surrendered cash. Police say there is no connection between the suspect and the apartment building.

Devonte P. Marshall is charged with two counts of armed robbery, one count of attempted armed robbery, and one count of aggravated battery; Maurice S. Morris is charged with one count of attempted armed robbery and one count of aggravated battery; and Garrett A. Babb is charged with one count of armed robbery.