The Fire Marshal's Office is responsible for determining fire causes within the City of Jacksonville, a service that is also available upon request to other area fire departments. The Fire Marshal assigned to this division performs formal fire inspections, fire investigation, and assist with other activities assigned to Fire Prevention. These inspectors are the "police" of the Fire Department, and investigate all fire-related crimes within the city. Inspectors are State-certified firefighters, law enforcement officers, and arson investigators, and have the same authority as any Texas Peace Officer.
Inspectors are also responsible for investigating fires that resulted in burn injuries and/or fatalities, as well as all misdemeanor offenses involving fires, such as false alarms and criminal mischief fires. In cases involving juveniles, inspectors either counsel the juvenile and his/her parents, or refer the juvenile to the Police Department.