Jonathan Watson, 41, confessed in the letter to the Bay Area News Group in Northern California that he clubbed both men in the head on Jan. 16 at the California Substance Abuse Treatment Facility and State Prison in Corcoran.
Graham De Luis-Conti, 62, died three days later at a hospital.
Both were serving life sentences for aggravated sexual assault of a child under 14.
“We can't comment on an active investigation," Dana Simas, spokesman for the California Department of Corrections and Rehabilitation, wrote in an email.
CALIFORNIA CHANGES WORDING FROM 'AT-RISK' TO 'AT-PROMISE YOUTH' TO HELP DISADVANTAGED STUDENTS.
Watson wrote that six days after he arrived at the prison, a child molester moved into the pod.
Watson said in the letter he couldn't sleep that night “having not done what every instinct told me I should’ve done right then and there.". »