State Attorney Phil Archer in Seminole County said in a statement Wednesday that Samantha Scheibe's decision not to cooperate and the lack of other corroborating evidence made a successful prosecution unlikely.
Zimmerman had faced charges of aggravated assault, battery and criminal mischief following a Nov. 18 incident at the central Florida house he shared with Scheibe. She initially told police Zimmerman pointed a shotgun at her face, then recanted in an affidavit filed this week.
Zimmerman was acquitted last summer in the shooting death of unarmed, black teenager Trayvon Martin. The case sparked a nationwide debate about race and self-defense laws.