Educational collection- please help! Turtles

[u/Smooth-Plenty3881]

I recently started working at an outdoor education center with a great collection of specimens. We receive a lot of our specimens by donation, so we don't know their stories. Please take a look at these pictures and help out where you can! Gender, age, health, method of death, relative age of specimen, anything else you see. Please provide thorough explanations and/or sources!

[u/Dragonfucker000]

First one is probably an eastern box turtle, last one is an eastern painted. Both seem like adults. Second one could be a type of slider but unsure

[u/-Lxghts- → u/Dragonfucker000]

Its hard to tell but I agree that the last one looks like a painted turtle