CHRISTIANSBURG -- Attempted capital murder charges against a Christiansburg man moved forward Tuesday after two police officers testified that he rammed his station wagon head-on into their cruiser.

William Shane Mattox, 30, faced a total of 27 charges -- five felonies and 22 misdemeanors -- related to three separate incidents.

At a hearing that lasted more than two hours Tuesday in Montgomery County General District Court, a judge certified to a grand jury the two attempted capital murder charges, as well as charges of destruction of property and damaging property while an inmate. The grand jury will decide whether Mattox should face a trial in circuit court.

Judge Randal Duncan dismissed another attempted murder charge.

Mattox was arrested after an incident that took place on Hill and Pepper streets in Christiansburg the night of June 16.

Tim Castor and his ex-wife Patricia Sanders, who live next to each other on Pepper Street, testified that Mattox showed up at Sanders' home asking for her daughter, who is Mattox's wife.

Sanders said that she pushed the door closed on Mattox and called 911.

Castor said that Mattox pulled out a straight razor. He backed away and began cutting himself on the face, Castor said.

Castor said that he picked up a garden stake and Mattox cursed at him.

Mattox got in his car and sped backward out of the driveway as Tim Castor's son, Jarrod Castor, walked down it.

Jarrod Castor testified that he jumped out of the car's way and onto a fence. He said he didn't know how close the car had come to him, leading Duncan to drop the attempted murder charge in that case.

Christiansburg police Officers Chris Heidt and Rene Fonseca were in their patrol car on Hill Street when Mattox pulled onto it off of Pepper Street. They testified that Mattox stopped the car, then scowled at them and sped forward.

The Subaru that Mattox was driving was going about 10 to 15 mph when it struck the police cruiser, they said. The impact knocked the car back more than a foot but didn't cause its air bags to deploy, they said.

They pulled out their pistols and yelled several times for Mattox to get out of the car. He finally did but wouldn't put his hands up, they said. Eventually he tossed something, which later was determined to be the straight razor.

The officers arrested Mattox and placed him in the back of their car. Heidt said he had to calm Mattox several times after Mattox rammed his head into the steel cage inside the car, cutting the skin between his eyes.

Later, while he was being held at the Montgomery County Jail on Aug. 6, Mattox cut himself on the face again, a deputy testified.

He broke a window in a door at the jail after other inmates taunted him, telling him he needed to cut deeper if he wanted to do it right, said Deputy David Smith.

Duncan found Mattox guilty of misdemeanor charges of assault on Tim Castor, carrying a concealed weapon and obstruction of justice.

Mattox also was found guilty of all but one of 17 misdemeanor counts he faced of tampering with a vehicle. He let the air out of 34 tires on 17 cars at Rob-N-Sons Motors on May 23 after the company repossessed a car it had sold him.

Duncan dismissed one of the charges because of the wording on a warrant.

Christopher Tuck, Mattox's lawyer, appealed the convictions on the misdemeanors.

Mattox had also faced a second count of destructing property while an inmate, and a charge of driving under the influence of alcohol, but both of those were dropped by Assistant Montgomery County Commonwealth's Attorney Nicole Terry.