Categories Articles A 79-year-old inmate has been linked to more than 60 deaths, making him the most prolific serial killer in US history Post author By crystalg Post date June 9, 2019 Business Insider Feedburner Tags 'Killer', 'Serial', 79yearold, Been, Deaths, History, inmate, linked, Making, More, most, Prolific, Than ← Three UK to launch 5G network in August → 19 Democratic Presidential Candidates Took the Stage Sunday. No One Stood Out