Teen placed in coma after tasing by cop

An FBI investigation is underway after a traffic stop on Sunday in Independence, Missouri went horribly wrong.Bryce Masters, 17, went into a medically induced coma after a police officer used a stun gun on the teen, allegedly causing cardiac arrest.Investigators are reviewing witnessesâ cell phone video to determine if excessive force was used. For more information please visit http://www.hlntv.com/