He served as an expert witness in the aftermath of several school massacres, and has studied the effects of violent media on adolescent violence. “More than any other aspect of these new video games,” Grossman writes, “it’s the accuracy of the stimulation—the carnage, the blood, the guts—that is so advanced. Realism is the Holy Grail of the video game industry. And the latest technology leaves little to the imagination—the stimulation seems less fake, and therefore more effective.”[69]