By Matt Volz
The Associated Press
HELENA, Mont. — Police are trying to piece together what led a dog trainer to shoot and kill a state trooper along a roadside in southwestern Montana, prompting a manhunt that ended with the suspect found dead in his truck.
That's only the first of several unanswered questions surrounding the killing of Montana Highway Patrol officer David DeLaittre, 23, who was found dead of a gunshot wound in his vehicle on Wednesday afternoon.
Mont. cop killed on roadside; suspect dead