Prey Drive by Wrath James White

Eight years ago, Joseph Miles went in search of a cure for a disease he was convinced was turning him into a monster. The result was a killing spree that left a string of dismembered and cannibalized bodies from San Francisco to Seattle. After being tried and sentenced to life in prison, Joseph is still searching for a cure. But he can't find what he's looking for behind bars. With the aid of a lonely guard and a young model, he will try to get out. But his help may have very different ideas for him...