DENISON, Tex. (KXII) - Phil Chalmers is an author, TV personality, and homicide trainer who helps law enforcement go inside the minds of killers in the U.S.
Chalmers says he has studied killings for 35 years, and has even sat down with close to 200 school shooters, mass murderers, and serial killers.
He brought his seminar of "Why Teens Kill" to Grayson College Friday morning.
"The key for me is interviewing the offenders, to find out why they do what they do," said Chalmers.
Grayson County Chief Sheriffs Deputy Tony Bennie has been to the seminar before, and wanted to bring Chalmers to Grayson County to speak with local law enforcement and educators.
"If they (people in the audience) are able to spot someone who is in crisis, who are demonstrating the warning signs, who recognize what triggers are, they can stop the next school shooting, that's exactly what we want to achieve with this," said Bennie.
In his research and interviews with killers, Chalmers says some of the warning signs of teen killers include abusive relationships at home, drug and alcohol abuse, fascination with weapons, and depression, among others.
Chalmers says he can relate.
"Its important to me, I grew up in poverty, I grew up in a bad situation in Cleveland. It's close to my heart and its personal to me. I could have been a troubled kid easily," said Chalmers.
According to the Center for Homeland Defense and Security, there have been four active shooter incidents in K-12 schools so far this year in the U.S.
Chalmers says his goal is to take that number down to zero.
"So hopefully Texas will be safer after today," said Chalmers.