Who is Michael Fry, the man who rammed a truck into the FOX4 building?

The man who rammed a truck into the side of the FOX4 building in downtown Dallas early Wednesday ranted about feeling threatened by police.

Michael Chadwick Fry has a lengthy rap sheet, but the incident that appeared to set him off was a 2012 officer-involved shooting in Denton County. Flyers created by Fry and strewn outside the studio focused on the incident.

Investigators say Fry and another man, Roberto Carlos Hernandez, were in a car that deputies tried to pull over. After a short pursuit, deputies say the men refused to follow directions and Hernandez rammed the deputy's cruiser.

The deputy shot and killed Hernandez and Fry was arrested for a probation violation. The Texas Rangers investigated and the deputy was not charged.

Fry's run-ins with law enforcement dates back to 2003 when he was just a 19-year-old. Some notable charges include assault, drug possession and multiple DWIs.

Hernandez’s mother, Silvia, is angry at what Fry has done and what he's been doing over the years. She says Fry was a bad influence on her son and led up to Hernandez's deadly run-in with a deputy. She blames Fry for her son's death.

“He should feel guilty. He’s the main reason why my son is not here,” she said. “He should be dead, not my son.”

Silvia says she's surprised Fry is still alive because of his reckless, criminal lifestyle. She's shocked he'd commit this crime in her son's name and says she's had no contact with Fry.

“Since the day my son was killed, that’s the last day I saw Michael,” Silvia said.

Silvia says her son was trying to distance himself from Fry, realizing he was dangerous. Hernandez was trying to better his life after the birth of his son, Travis, who is now 5 years old and in the care of his grandmother.

“He’s crazy. His mind is not right,” Silvia said. “I feel horrible for him mentioning my son’s name or doing anything in my son’s name. All I want is my son to rest in peace.”

Kim Knowler has known Fry since he was about 12. Their homes are a stone’s throw apart on Oakwood Drive in Bartonville, a town south of Denton. She often saw police at the home he shares with his mother.

“It was like I wasn't surprised at all, I really wasn't,” Knowler said. “He always seemed to be like Teflon. Every time he'd get arrested he'd be out, back down there, after a couple of weeks and it was like surely he's done enough stuff to where they can keep him for a lot longer than that.”

As Fry was walked into the Dallas County jail late Wednesday morning after attacking the FOX4 building, he loudly spoke about the 2012 shooting that resulted in his friend's death.

"I'm not smart enough, I'm not powerful enough, I don't have enough money. I'm mentally challenged, I tried to do what I could to demand questions, to be heard,” Fry said.

Knowler says she started having problems with Fry about a year.

“I wouldn't say he's mentally challenged," she said. "I would say he's uneducated and I'd say he probably has a drug problem and I'd say he probably has a mean streak.”

She said she had issues with his unleashed dogs going after her cats and tried talking to him about it, but was met with rage.

“Then a couple of cats ended up missing. I don't know. Can't say yes, can't say no but it was pretty odd I'd had cats for 8 years and all of a sudden they're gone,” Knowler said.

She decided to secure her home with cameras.

Knowler says despite Fry's apparent issues and desperation, she doesn't think his motive was entirely sinister.