Multiple dead birds inside the coop, with that kind of damage, is most likely the work of raccoons, and likely as not, more than one. Like momma and all the kids. They could enter through a hole that is only a few inches wide like it wasn't even there. A month or so back, I witnessed a full sized coon go through a woven wire fence......hole was about 4" x 5".....no larger.
Now that you know what didn't work as far as a secure coop is concerned, if you plan to have more birds, your next order of business will be to find a way to secure what you have or build something better. As is, there is no point restocking with new birds, they will be killed too. No need to trap or do anything more with the birds or predators until you have a secure coop that nothing but you can enter.
Fort Knox and make it bomb proof.
Trapping for me allows for confirmation of predator ID. With no birds, I would even release caught animal to enable testing of coop upgrades since no chickens would be a risk. Creating trapwise will not be a consequence once upgrade complete.