As for other school shooters, here are some of their animal cruelty crimes, as noted in a 2008 article posted in the Michigan State University Animal Legal & Historical Center:
Eric Harris and Dylan Klebold (Columbine High School, 1999): Told classmates they mutilated animals.
Luke Woodham (Pearl High School, 1997): Set his dog on fire.
Kip Kinkel (Thurston High School, 1998): Blew up cows and decapitated cats.
Andrew Golden (Westside Middle School, 1998): Shot dogs, including his own, with a .22 caliber rifle.
According to the 2014 study, “Animal Abuse as a Warning Sign of School Massacres,” of the 23 perpetrators of school shootings between 1988 and 2012, 43 percent of them had committed animal abuse – most often toward pets like cats and dogs.
Many other studies have also shown the correlation between animal and human abuse. In one study cited by Psychology Today, 70 percent of the most violent prisoners in several federal penitentiaries had repeatedly abused animals during their childhoods.
To help law enforcement agencies crack down on animal abuse by investigating and prosecuting cases, the Humane Society of the United States (HSUS) provides training to thousands of officers each year that focuses on the connection between cruelty to animals and violence against humans. “Next month, in a sad irony, the HSUS will collaborate with the Florida Prosecuting Attorneys Association to discuss these very issues,” acting HSUS President Kitty Block wrote on her blog.