ORLANDO, Fla. — The parents of George Zimmerman have sued comedian Roseanne Barr, saying they fled their Lake Mary, Fla., home in the middle of the night and have been unable to return because she posted their address on Twitter two years ago.

Robert Zimmerman Sr. and Gladys Zimmerman filed suit Monday in state circuit court, accusing Barr of trying to incite “a lynch mob” to carry out “vigilante justice.”

Their son George Zimmerman killed Trayvon Martin, an unarmed black teenager. A jury acquitted Zimmerman of second degree murder.