To evade authorities chasing him, Unabomber Theodore Kaczynski kept shoes with smaller soles attached to the bottom in his reclusive Montana cabin, according to evidence released 10 years after his capture.

The shoes were intended to make it appear as if a person with smaller footprints were walking in them, investigators believe.

Kaczynski, 64, is serving a life sentence with no possibility of parole for a bombing spree that lasted from 1978 to 1995. The blasts from homemade bombs killed three people and injured 23.