SHERMAN, Tex. -- A Sherman man’s standoff with police lasted seven hours on Wednesday night. Now, he’s behind bars at the Grayson County Jail, but there's a twist to the story.

Richard Hunn, 37, was arrested around 5:30 Wednesday morning after a seven-hour standoff with Sherman Police. They finally forced him out of his car using non-lethal rounds, but this isn't the first time he's done this.

What started as a typical suspicious person call turned into a lot more than that for Sherman Police, but its something some of them had seen once before.

Almost exactly to the date, Hunn was arrested after strapping a bomb to himself outside the Sherman police department. He was charged with possession of an explosive device and attempted capital murder. In that case, court records show Hunn told police he wanted to kill himself and members of the police.

The attempted capital murder charges were dropped, but Hunn was found guilty of possession of an explosive device. However, he was declared mentally incompetent to stand trial. A doctor stated Hunn suffered from schizophrenia, major depression, and alcohol dependence.

He was sent to a Texas State Hospital in Vernon, Texas, and put on probation for 10 years because of the insanity plea. Court records show when Hunn was told he was going to Vernon, he was very unhappy.

Recently, Sherman police received word Hunn was out of the facility and in Grayson County.

This time, he might face those same charges and more after police found a pipe bomb in his car.

Officials say they received the initial call at 11 p.m. on Wednesday after witnesses saw Hunn slumped over the wheel of his car on northbound U.S. 75 near Fisher Control. When authorities approached the car, he sped off, leading to a high speed chase which ended at the 200 block of East Street near downtown.

At that point, officials say police noticed Hunn had what appeared to be a pipe bomb in his car, and they roped off the area.

After several hours of negotiations, authorities used non-lethal rounds to bring Hunn out of the car, and he was taken to the Grayson County Jail.

While Hunn's motive is not yet known, Lt. Fair says officers did the right thing to subdue the suspect.

From earlier Wednesday....
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SHERMAN, Tex. -- A seven-hour standoff between Sherman Police and a man armed with a pipe bomb came to end around 5:30 Wednesday morning.

According to Sherman Police, they received a call around 10:30 Tuesday night of a suspicious vehicle driving erratically on U.S. 75 late Tuesday and tried to pull him over. Instead, the man sped away.

Sgt. Bruce Dawsey says a brief chase ended when the car spun out on a gravel parking lot.

Upon approach of the vehicle, the driver, 33-year-old Richard Hunn of Sherman, was found slumped over in the front seat of the car. Hunn then took off, and a pursuit ensued.

After a successful perimeter was set up by Sherman Police, Hunn displayed what appeared to be a pipe bomb to authorities near East & Pecan Streets in Sherman. The standoff came to an end there around 5:30 Wednesday morning.

Sgt. Bruce Dawsey of the Sherman Police Department says officers used tear gas seven hours later to flush the man into the open, then fired beanbag rounds at the man to force him to drop the pipe.

Hunn was taken to a local hospital for precautionary reasons where will be booked into the Grayson County Jail upon his release.

The D/FW Airport Bomb Squad was called to the scene where they were successfully able to detonate the explosive safely after the standoff ended. No one was injured in the contained blast.

This is not the first time Hunn has been arrested. In October 1999, Hunn was arrested for possession of an explosive device and attempted capital murder after he was discovered attempting to detonate an explosive device behind the Sherman Police Department.