Buffalo , New York, shooting suspect Payton Gendron displayed his inhumanity toward animals before his alleged racist attack on supermarket shoppers.

Gendron, accused of killing 10 people at a store he targeted because it served a Black neighborhood, wrote in March that he stabbed and beheaded a feral cat, The Washington Post reported Tuesday.

In a diary-like entry that apparently originated on the messaging platform Discord, Gendron said he spotted the stray attacking his familys cat in the garage and repeatedly stabbed the animal. He wrote that he bashed its skull against concrete and chopped off its head with a hatchet. He shared a photo of the body, decapitated and bloodied.

I called my mom and she gave me a box and I dug a shallow grave in the backyard, he wrote on March 25, per the newspaper. Honestly right now I dont feel anything about killing that cat. I thought I would be in pain but I literally just feel blank.