Leyton said it happened some time ago and he isn't revealing the suspect's name. Attempted poisoning can carry a penalty of up to 10 years in prison.
Abuelazam faces charges of murdering three people and trying to murder five others for a series of stabbings in the Flint area. He's also charged with attempted murder in Toledo, Ohio, and suspected in similar attacks in Leesburg, Va., where he once lived.
Abuelazam was arrested in Atlanta on Aug. 11 while trying to fly to his native country, Israel.