SEMINOLE COUNTY, Fla. - They were brothers. They were fathers. And on a Tuesday afternoon, they were both gone - in an instant. Dr. Christopher J. Marier, 42, and his brother Tyler M. Marier, 40, were killed July 7 when authorities say a convicted felon sped away from a traffic stop and broadsided their gray SUV at the intersection of South U.S. Highway 17-92 and Sunnytown Road in Casselberry.