Charges have been filed against John Pratt Jr., claiming that he threatened to kill Bexar County's district attorney and the state attorney general.
Pratt, 43, was arrested Thursday on a charge of making terroristic threats.
An arrest warrant affidavit stated that a nurse at Audie L. Murphy Department of Veterans Affairs reported that, while she was performing a medical evaluation of Pratt on April 6, he told her he "heard voices" telling him to kill the DA and attorney general.
The affidavit stated that Pratt checked himself into the hospital after having unrealistic thoughts that police were watching him and he was a wanted man.
The nurse told Bexar County sheriff's deputies she became alarmed by the threats.
She said that Pratt told her he planned to use explosives to kill the officials, the affidavit stated.
According to the affidavit, Pratt is a combat engineer in the U.S. Army and does have knowledge of explosives.
Sheriff's investigators later questioned Pratt who told them he apparently made the threats while he was off his medication, and did not have any memory of it, the affidavit stated.
The affidavit also stated that a doctor told detectives he no longer believed Pratt was a threat to anyone.
However, an assistant DA told investigators that it is the stance of the district attorney's office that "John Pratt posed an imminent threat" based on his history and mental condition, the affidavit stated.