I just found out about them. It's been out for a bit apparently, but I was typing my name into a site and it pulled up the information.
The creatures that led to the death of so many are...Titan shifters, just like Eren. And worse, they are soldiers in my regiment, pretending to be human just like the rest of us. And they kidnapped Eren.
I don't know what kind of distraction is appropriate for that situation, but unless I find something now, I'll take this out on something.