MEMPHIS, TN - (WMC-TV) – The Mississippi Highway Patrol is warning drivers to be cautious while being pulled over as they investigate two deadly highway shootings. The Mississippi Highway Patrol's Bureau of Investigation said there are similarities between both incidents. "The concern is that someone is posing as a law enforcement officer and that is how these vehicles end up on the side of the road," said MBI Director Lt. Col. Larry Waggoner in a written statement. Both deadly shootings happened on Mississippi highways. "I know there are a lot of rumors. We don't know anything right now that is...