Rabbi Charlie Cytron-Walker said Friday that while Akram had a drink in his hand, he threw a chair at Akram and he and the two other remaining hostages fled.
DeSarno, who had attracted attention for saying on Jan.
Though he did not name the prisoner, other law enforcement officials have identified her as Aafia Siddiqui, who is serving an 86-year prison sentence after being convicted of shooting at American military personnel after being detained in Afghanistan.
He arrived in New York on a tourist visa about two weeks before the attack and cleared checks against law enforcement databases without raising any red flags, officials said.
Investigators had been trying to determine how Akram got to Colleyville from Dallas.
The FBI is still investigating how Akram got the gun used in the attack, though it has had success in tracking his movements from the time he arrived in New York on Dec.