I had a cardboard box with some mousetraps and live traps. I caught one mouse in a live trap. buried it in my backyard. There may have been some blood or a very small amount of mouse tissue on a trap.
one month later I have these bugs in the box with lots of bug residue as well. they look like small pill bugs

thanks

Do they curl up like pill bugs?

or are they pupae or shed skins? Was there any bait in the box or traps? Grain, that could have fed grain beetles that pupated..?

I did not think there was food in the traps but there was a trap that caught a mouse and there was some blood/fluid residue on one trap. Also it is possible that a mouse was caught in one of the plastic traps they were on. They look like really small pill bugs. I did not touch them to see if they curled up. They were everywhere and there was a lot of residual that you can see as well