The judge said he was competent. He was convicted in the stabbing deaths of his estranged wife and two young kids - he had ripped out their hearts.
Last month, he plucked out his left eye. (The picture at left appears to be before the latest incident.)
He told officers - who found him in his cell with blood on his face - that he ate it.
"Thomas said he pulled out his eye and subsequently ingested it," Jason Clark, a spokesman with the Texas Department of Criminal Justice told the Associated Press. He has been taken to a prison psychiatric unit.
Said his trial attorney, Bobbie Peterson-Cate: "He is insane and mentally ill. It is exactly the same reason he pulled out the last one."
Thomas is on death row for the grisly murders of his estranged wife, 4-year-old son and 13-month old daughter.
Thomas stabbed them to death and ripped out their hearts. He then took the hearts with him and put them in a bag before throwing them in the trash.
Then we went to a police station and tried to stab himself.
* Thanks Shelley for the tip.