Police told KWTX-TV that 24-year-old Pfc. James Gonzalez was taken into custody Wednesday night following surveillance on a house.
A police dispatcher, who declined to give her name, told The Associated Press early Thursday to contact the FBI. A message left with the FBI was not immediately returned.
A jailer, who also declined to give her name, said Gonzalez was in custody Thursday. She declined to release details.
KWTX reports court records indicate Gonzalez faces trial over an alleged assault involving his girlfriend. He missed a July 10 court date.
Gonzalez had been at a relative's house July 11. The Army contacted his family July 13 to say the private had not shown up for duty.