Matthew Williams told a federal judge Tuesday he was not guilty of a felony charge of public land set afire and is now set to begin a jury trial this April.

Federal prosecutors say the 23-year-old Williams used a cigarette lighter to set a range fire that eventually burned a total of 315 Gem County acres in August 2011.

Most of that land — 221 acres — belongs to the Bureau Of Land Management, according to U.S. Department of Justice reports.

The fire was set across from Freezeout Hill on Idaho 16 on Aug. 20, 2011. Court records do not say anything about a possible motive.

Williams is set to begin a two day jury trial April 22 in Boise in front of Chief U.S. District Judge B. Lynn Winmill.

The maximum possible penalty for the crime of public land set afire is five years in prison and a $250,000 fine.

Investigators with the BLM worked on the case. It is unclear why it took until 2013 for criminal charges to be filed against Williams, who was indicted by a federal grand jury Feb. 12.