A man who is on death row for killing three Madisonville children on September 6, 2000 is one of two inmates who was caught with contraband cell phones on Tuesday.
Raphael Deon Sanders was convicted of killing two of his step-children who were 7-years-old and 9-years-old at the time of the crime, along with his 1-year-old daughter.
All three girls died inside their burning home.
The first phone was found after a guard spotted it in the trash.
Texas Department of Criminal Justice spokeswoman Michelle Lyons says officials believe an inmate tried to discard it for fear of being caught.
The second phone was found as Holiday attempted to flush it down a toilet.
Holiday and the unidentified owner of the other cell phone face disciplinary action.
Last month prison officials imposed a statewide lockdown after condemned inmate, Richard Tabler, made threatening calls to state Sen. John Whitmire using a cell phone that had been smuggled to Tabler.