I'm sorry for your loss
I believe you already know they can't be repaired. Anyway TShirts are cheap.
It's maroon Printer's Choice ink from www.rivercitygraphicsupply.com . I use their inks exclusively and have never had anything like this happen before, but I don't do many jobs on light colored shirts either - most people around here want black, so scorching isn't usually an issue.Out of curiosity, what color and type of ink were you printing on these?