The gunman who opened fire on an Old Dominion University classroom was previously convicted of supporting ISIS and, according to court documents, was on probation for that terrorism-related charge when he carried out Thursday’s deadly attack. One person was killed and two other people were injured in the shooting. The suspect, identified by an FBI spokesman as Mohamed Bailor Jalloh, 36, was also killed. The mortally wounded victim was identified as Brandon A. Shah, an Army lieutenant colonel. Army Secretary Dan Driscoll said the two people injured at the university were Army personnel. The attack at the campus in Norfolk, Virginia, is being investigated as an act of terrorism, FBI officials said. Jalloh pleaded guilty a decade ago to attempting to provide material support to a designated foreign terrorist organization, ISIS.…