Four commercial structure fires in the city, have Sparks fire investigators concerned. All four fires started on the exterior of buildings. The four fires were on South Stanford Way – reported at 9:05am, Linda Way – reported at 7:26pm, Tyler Way – reported at 8:54pm and Pyramid Way – reported at 10:24pm, all on July 30th. Secret Witness is offering a cash reward in the amount of $1,000, for information leading to the arrest and prosecution of the person, or persons, responsible for intentionally setting those fires. The person of interest is a heavy set hispanic man with short dark hair and a mustache.