George Zimmerman made statements to Sanford, Fla., police that help establish his guilt of second-degree murder for killing Trayvon Martin, prosecutors said in a court filing on Thursday.

The claim came in a motion by prosecutors to keep some of Zimmerman's statements under seal pending his trial, Reuters reported.

Defendant has provided law enforcement with numerous statements, some of which are contradictory, and are inconsistent with the physical evidence and statements of witnesses, the prosecutors said in their court filing.

They said the statements by Zimmerman were admissible in court and in conjunction with other statements and evidence help to establish defendant's guilt in this case.

The court filing offered no details about the statements Zimmerman made to police or other law enforcement officials. It said Florida's public records law had no provision requiring the disclosure of a confession of a defendant.

The state asserts that this provision includes an admission of a defendant that could be used against him at trial, the filing said.

Zimmerman has pleaded not guilty.