Des Moines, Iowa ? Iowa State assistant men’s basketball coach Randall Brown resigned Monday after he was charged with possession of child pornography and obstruction of justice.

Brown, 45, remains free pending an initial court appearance March 11, said Al Overbaugh, spokesman for the U.S. attorney’s office in Des Moines. At that time, a preliminary hearing date will be set, and a judge will set bond.

According to an affidavit filed in support of the complaint, U.S. Postal Inspection Service investigators seized two computers from Brown’s home and one from his office Jan. 24. Visual images of minors engaged in sexually explicit conduct were found on them, according to the complaint.

The affidavit alleges that after Brown was contacted by investigators, he destroyed about 30 floppy disks that contained additional images. Brown acknowledged he was warned not to destroy evidence, “but that he had a ‘lapse of judgment’ and did a ‘stupid’ thing,” according to inspector W. Kevin Marshall.

A conviction on the possession charge carries a maximum penalty of five years in prison, and the obstruction of justice charge carries a maximum of up to 10 years.

Coach Larry Eustachy confirmed Brown had resigned. Athletic department spokesman Tom Kroeschell said Iowa State coaches and players would have no further comment. Brown was in his fourth season at Iowa State.