Accused arsonist Charles Wayne Collier, 25, was on probation for setting fire to a home in Petal three years ago, court records show.
Collier has been charged with four counts of arson for setting fires in downtown Hattiesburg. If convicted, he could face up to 20 years in prison for each charge.
Collier's bond has not been set. He's scheduled to go before a judge for arraignment Thursday morning.
Investigators say evidence and tips through Crimestoppers helped them solve the case.
Collier is charged with four counts of arson: three counts for torching two vans and a week later a school bus at Mount Carmel Ministries; and one for setting fire to an unoccupied building on North Main Street.
Investigators say Collier may have started those fires because of availability and location. Collier lived downtown and is a native of Hattiesburg.
Collier is not a suspect in the arson fire at the Old Hattiesburg High School building last month. Investigators say they're still looking for the person who committed that crime.