http://gawker.com/dad-calls-cops-on...m_source=gawker_twitter&utm_medium=socialflow A father's attempt to teach his son a lesson for taking his truck without permission ended in tragedy Monday after a local police officer shot the teenager dead. James Comstock told the Des Moines Register he called the police on his son Tyler after the latter took the former's truck in retaliation for refusing to buy him cigarettes. Ames Police Officer Adam McPherson reportedly spotted the lawn care company vehicle and pursued it onto the Iowa State University campus, where a brief standoff ensued after Tyler allegedly refused orders to turn off the engine. McPherson eventually fired six shots into the truck, two of which struck Tyler who was later pronounced dead. The official report claims the action was necessary in order "to stop the ongoing threat to the public and the officers." Tyler's dad says he was unarmed at the time.