Either the hearts are still or they are beating. If they meant 'still beating' their understanding of punctuation is severely flawed and I hope the sentencing facility will do their best to correct this.
edit: “Justin was the kind of kid who didn’t read the newspaper,” said Jack Carter. “He didn’t watch television. He wasn’t aware of current events. These kids, they don’t realize what they’re doing. They don’t understand the implications. They don’t understand.”
already talking past-tense. Not a good look pops.