One guilty plea was entered while charges were withdrawn against three during preliminary hearings held on Wednesday.

Thomas A. Niles, 30, Warren, pleaded guilty to a count of possession of marijuana.

Charges were withdrawn against the following defendants:

¯ David A. Delahoy Jr., 20, Jamestown, NY. Delahoy had been charged with possession of marijuana and a seat belt violation. A speeding violation was re-categorized as a traffic offense and a count of disorderly conduct was re-categorized as a non-traffic offense.

¯ Dakota S. Griffin, 22, Russell. Griffin had been charged with criminal trespass — break into structure and two counts of harassment.

¯ Waylon M. Henderson, 27, Tidioute. Henderson had been charged with a count of propulsion of missiles onto roadways. A count of disorderly conduct was re-categorized as a non-traffic offense.