Villanueva had been serving a life sentence with a chance of parole for sexually assaulting a child under the age of 14 in Los Angeles County.
The incident is being investigated as a homicide, and prison officials have restricted movement in the area where the attack occurred.
Escobar is the primary suspect in the killing and has been placed in restricted housing while the investigation is ongoing.
Escobar is serving life in prison without the possibility of parole for a 2018 crime spree in which he killed five men and injured seven others, mostly homeless individuals.
Escobar’s victims were attacked with either a baseball bat or bolt cutters, and all but one were homeless.
Kyle James Lee – The AEGIS Alliance – This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.