David Kaczynski, who in 1996 turned his older brother in, spoke about his personal journey during a Fort Wayne, Ind., meeting of the National Alliance for the Mentally Ill.
"You think you're over something, but it's never gone," the younger Kaczynski said. "I have lots of fond memories of Ted. He was always very kind to me. I adored him," the Fort Wayne (Ind.) Journal Gazette reported.
Kaczynski had no regrets about leading authorities to the Montana cabin to end his brother's 17-year string of mail-bombings that killed three people and injured 23 others.
"You just couldn't sit by and watch even someone you love hurt innocent people," Kaczynski said.
Kaczynski, now director of New Yorkers Against the Death Penalty, said society should be protected from people who are mentally ill, but "they should not be subject to the ultimate sanction. Someone like my brother clearly needs to be locked up."
Ted Kaczynski, a paranoid schizophrenic, was sentenced to life in prison.