Description:The events of May 12, 2010, still haunt Lukas Thompson. He was a senior in high school, playing trumpet in band class when Joshua Shirley, a drummer he barely knew, whipped out a butcher knife.
“The biggest thing I remember is getting hit in the back of the head and then I looked down and there was blood all over my hands. I went into shock and fell on the ground and one of the kids in my class took off his sweater and started doing first aid,” said Thompson.(1:57)