A Georgia teenager says that less than an hour before Patrick Sharp tried to set off a massacre outside the McKinney police headquarters, he contacted her online.
"Killers like to share their thoughts, seek attention," read a message the girl says Sharp sent her Tuesday morning on Facebook.
"I like to scare people. I enjoy watching people beg for their life. I like watching them drown. When they take their last breath, oh it's amazing."
The short letter the girl shared with The Dallas Morning News is the first glimpse into what might have led Sharp to try to commit mass murder.
In it, he didn't mention McKinney police or whom he planned to attack, but he told the girl he might have mental health issues.
"I have alot of [stuff] wrong with me, but didn't seek help," he told the girl, who is not being identified. "I don't take meds."
Police say the 29-year-old Anna man lit his pickup truck on fire around 9 a.m. in an apparent attempt to lure people out of the building. Attached to the truck was a trailer packed with wood chips, roadside flares, gasoline and ammonium nitrate fertilizer, the type used in the 1995 bombing of the Oklahoma City federal building. Heat from the fire in the trailer set off ammunition left in the truck but failed to ignite the explosives.
Sharp hid several hundred yards across the street in a wooded area. He screamed at the people as they exited and shot toward them.
Sharp's body was found with a .223 assault rifle, a .12-gauge shotgun, and a .45 semiautomatic pistol, police said. A blue carrier vest he wore had extra ammunition rounds.
He fired about 100 rounds at the police station, and fired at the nearby Collin College building. He shot out nearly two dozen windows at the police station but the bullets didn't strike a single person.
Less than five minutes after the attack started, Sharp was dead, possibly from a self-inflicted wound, police said.
Soon after Tuesday morning's incident, The News contacted all of Sharp's friends on Facebook, and four responded. The Georgia teenager said she wanted to share a message she got from Sharp that was time-stamped 8:07 a.m.
In an e-mail, the teenager said she met Sharp on a mobile social networking site called Mocospace. On that website, she said, Sharp often told her about his desire to kill people, especially children. She said she always thought he was joking.
"Just think of all the weird [stuff] on moco I said," Sharp wrote the day of the shooting. "Most of it was true."
On Sharp's Mocospace page, he indicated that he had planned the attack before Tuesday morning. His last status update was Sunday, when he wrote, "I'm out for good y'all, [screw] all my haters."
He said he was "packed and ready to go."
He went on to describe what would be his last hours alive.
"My last meal was White Castle cheeseburgers and a Dr Pepper," he wrote.
He thanked a girl for "the good times" and said he loved her.
In the letter to the girl he sent Tuesday morning, he wrote that he was reaching out to her because he wanted to help her become a better homicide detective later in life.
"I'm leaving this world today," he wrote at the end of the letter. "I've had enuff. I have a cat too, sure sign of a killer lol. Take care of ur self."