Part 2: Why investigators think prison gang leaders selected parolee Evan Ebel to kill prisons chief Tom Clements, and why Ebel was headed to Texas, where he was killed in a shootout with cops.

TUCSON, Ariz. (13 News) - Christopher Clements received a natural life sentence today, April 10, for the murder of Isabel Celis in Tucson more than a decade ago. Clements was convicted in February ...