DENVER -- Attorney Jack Ebel testified before the Colorado Legislature two years ago that solitary confinement in prison was destroying his son's psyche.When Ebel's friend, Gov. John Hickenlooper, was interviewing a corrections official for the top prisons job in Colorado, he mentioned the case as an example of needed reform. After Tom Clements got the job, he eased the use of solitary confinement.Now authorities are investigating whether the son, Evan Spencer Ebel, who was paroled in January, killed Clements on Tuesday. Evan Ebel was killed Thursday in a shootout in north Texas."Although Jack loved his son, he never asked me to intervene on his behalf and I never asked for any special treatment for his son," Hickenlooper said in a written statement.