Inmate allegedly assaults deputy: A Fairfax County jail deputy required six stitches after being beaten by an inmate Tuesday night during a routine check, and the inmate was charged with malicious wounding and attempted escape by force, the sheriff's office said yesterday.

The deputy's name was not released, but he has been a Fairfax deputy for less than two years, Lt. Tyler Corey said.

The deputy was checking cells after inmates were to be locked in for the night after 11 p.m., Corey said. One inmate was missing from his cell and ambushed the deputy from behind and began beating the deputy, Corey said. No other inmates were involved, and other deputies responded to an emergency call and quickly broke up the fight, Corey said.

Sheriff's officials charged Douglas Preston, 20, with the attack. Corey said Preston has been convicted in Fairfax of abduction and robbery, and has been sentenced to 56 years in prison. He is awaiting transfer to a state prison. The deputy was treated for a head wound at Inova Fairfax Hospital and released, Corey said.

No alibi defense for Malvo: Attorneys for sniper suspect Lee Boyd Malvo said yesterday they will not present an alibi defense to the capital murder charge that Malvo shot and killed FBI analyst Linda Franklin last fall, according to a motion filed yesterday in Fairfax County Circuit Court.

Franklin's killing, outside a Home Depot store in the Seven Corners area, was one of 10 fatal shootings in which Malvo, 18, and John Allen Muhammad, 42, are charged. Muhammad is being tried in Prince William County. Both face the death penalty if convicted.

Prosecutors allege that Muhammad and Malvo wanted to extort $10 million from the government in exchange for stopping the shootings. Before trial, the defense must notify the prosecution if it intends to rely upon an alibi defense. As part of pretrial discovery, defense attorneys Michael S. Arif and Craig S. Cooley said that they were not conceding that Malvo was present at Franklin's shooting but that they will not be presenting the "affirmative defense" of an alibi.

Compiled from reports by staff writers.