The only problem with a trail camera would be he could just climb up and take it, and there goes your evidence.
Something like this might be better if your wifi router is close enough.
https://www.amazon.com/Security-Rechargeable-Surveillance-Waterproof-Detection/dp/B086V5H1YQ/ref=sr_1_5?dchild=1&keywords=wireless+outdoor+security+cameras&qid=1599874880&sr=8-5
Bttt