ORLANDO, Fla. (AP) — The former neighborhood watch volunteer who shot and killed Florida teenager Trayvon Martin filed an appeal Tuesday saying the judge in the case is biased against him and should be replaced.

George Zimmerman said in an appeal filed with the 5th District Court of Appeal in Daytona Beach that he fears he would not be able to get a fair trial if Circuit Judge Kenneth Lester continues presiding over the case. Lester had previously rejected a motion filed by Zimmerman to disqualify himself.