Convicted Serial Killer Billy Chemirmir Killed by Cellmate in Texas Prison

Billy Chemirmir was convicted of killing two elderly women in Texas but was suspected of killing over 20 more.
He was serving two life sentences without parole when he was attacked and killed by his cellmate, who was also convicted of murder.
Chemirmir targeted vulnerable elderly women, smothered them, and stole their valuables.
He was caught after one of his victims survived an attack and identified him to police.
The Texas Department of Criminal Justice is investigating Chemirmir's death but has released few details so far.