. >> for 39-year-old building contractor ari squire, preparing diesel trucks for these competitions was more than a hobby. it was his obsession. to accommodate this pasttime, ari built a 2300 square foot garage on his property in the chicago suburbs. >> ari was a bit of a gearhead. so had he his truck that he was apparently he was always working on. >> it wasn't considered a dangerous hobby until one february morning in 2008 when ari's wife called 911. >> 911, lake county sheriff. >> i think my garage is on fire. i just heard some noise and i opened the door and it's all black smoke. >> and there's smoke coming from your garage? >> should i go outside or what >> wait inside where it is safe. okay? >> when the smoke cleared, firefighters found ari's lifeless body underneath a truck. >> it appeared the truck had slipped off the front jack and it had crushed the victim. >> he had suffered severe burns over most of his body. it looked like the truck fell off the jack while ari was underneath working on the fuel filter. fuel spilled from the filter on to ari's clothes. the truck broke a fluo