So said T.J. Lane, the 18-year-old convicted of killing three students at Ohio's Chardon High School, to the families of his victims at his sentencing this week. From the Associated Press:

T.J. Lane, 18, had pleaded guilty last month to shooting at students in February 2012 at Chardon High School, east of Cleveland. Investigators have said he admitted to the shooting but said he didn't know why he did it.

Lane was defiant during the sentencing, smiling and smirking throughout, including while four relatives of victims spoke.

After he came in, he calmly unbuttoned his blue dress shirt to reveal the T-shirt reading "killer," which the prosecutor noted was similar to one he wore during the shooting.

At one point, he swiveled around in his chair toward the gallery where his own family members and those of the slain teenagers were sitting and spoke suddenly, surprising even his lawyer.

"The hand that pulls the trigger that killed your sons now masturbates to the memory," he said, then cursed at and raised his middle finger toward the victims' relatives.

Lane was given three life sentences with no possibility of parole, but I imagine his sassy mouth will get him slain in prison in no time.