Hey, thank you so much for helping this snake! I'm not that familiar with what snakes are in your area, but great job! I'd ask them to save & bring the other snakes
they catch like this too? Poor snakes....

To me, it looks the most like either a queen snake https://dnr.wi.gov/topic/EndangeredR...ode=ARADB27040 or a lined snake
https://dnr.wi.gov/topic/EndangeredR...ode=ARADB38010 but I can't tell for sure.

Check out this site: https://dnr.wi.gov/topic/WildlifeHab...e&group=Snakes