Sorry for your losses. Anytime you free range, your flock is at risk of being attacked, so hopefully you can figure out the culprit.
If you decide to trap the animal, you should be willing to end it’s life. It is usually illegal in most places to release animals elsewhere. In addition, relocating an animal often means it will die bc it is now in another animal’s territory or has no means to adequately support itself (new territory to learn). If you are not willing to end its life, don't trap. Instead figure out other means to deter the predator(s) while allowing them to live in their territory. So, electric fence, or supervised/limited free range time, secure run, etc are all options besides trapping the predator.
If you decide to trap the animal, you should be willing to end it’s life. It is usually illegal in most places to release animals elsewhere. In addition, relocating an animal often means it will die bc it is now in another animal’s territory or has no means to adequately support itself (new territory to learn). If you are not willing to end its life, don't trap. Instead figure out other means to deter the predator(s) while allowing them to live in their territory. So, electric fence, or supervised/limited free range time, secure run, etc are all options besides trapping the predator.