Authorities in McKinney, Texas, remained baffled Wednesday as to why a heavily armed man orchestrated an elaborate attack on the town's public safety building a day earlier, opening fire on officers and attempting to ignite explosive substances before turning the gun on himself as police closed in.

McKinney Police Chief Doug Kowalski said Wednesday that 29-year-old Patrick Gray Sharp "was looking to die" in what he called "a clear case of suicide by cop," but added that police still don't understand the motive behind the attack.

Investigators have spoken with Sharp's friends, family members and co-workers. They all described Sharp as "a very nice individual," Kowalski told CNN's "Rick's List."

"They are shocked by yesterday's events," Kowalski said.

McKinney city spokeswoman Anna Folmnsbee said Wednesday the area in front of the building was still a crime scene and the investigation was ongoing.

No one else was injured in the attack, which unfolded in less than five minutes, police said.

"He just elected that he was going to die yesterday, and he was going to go out with guns blazing," Kowalski said.

Sharp appeared to allude to his possible death a day before the attack, Kowalski said.

"We found some correspondence to that effect on some social networking pages," he said. "He contacted his previous boss and made statements to that effect."

On a Facebook page belonging to a Patrick Gray Sharp, with a listed current city of McKinney, Texas, the "likes and interests," section included "Trucks, Trailers, There's just something about shooting guns that makes me feel good ... "

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