Waco, Texas (CNN) -- Prosecutors have enough evidence against an AWOL U.S. soldier accused of plotting an attack on fellow soldiers at Fort Hood to present their case to a grand jury, a federal judge in Texas ruled Thursday.
Pfc. Naser Jason Abdo was arrested last week in Killeen, Texas. At a probable cause hearing Thursday afternoon, federal agents told Magistrate Judge Jeffrey Manske that Abdo had been plotting a bomb attack on nearby Fort Hood -- the largest U.S. Army post -- and that material found in his motel room could be used to assemble bombs.
FBI Special Agent Michael Brogan testified that Abdo admitted he was planning a massive bomb attack against the post. Abdo smiled as Brogan recounted that admission.
Abdo is a Muslim American paratrooper who had been granted conscientious objector status after he refused to deploy to Afghanistan. In May, he was charged with possession of child pornography on his computer, according to the Army, and he has been absent without leave since June.
He appeared in court Thursday with heavy shackles around his wrists and ankles, while U.S. marshals and bomb-sniffing dogs stood guard outside the courthouse.