I just got off the phone with Ink & Iron Festival producer Trace Edwards -- as it turns out, the stabbing that was reported to me by a bartender, and circulated as a story among some convention-goers, was NOT accurate.
An individual thought he had been stabbed in the heat of the moment. In fact, he merely took a bump, and thought he might have been stabbed. He was back partying at the show the next day.
We sincerely regret the error. The show was a blast, and now we know that it was 100% safe as well.