Coons are scavengers. They are attracted to anything edible.
Coons are also very smart and good with their hands.
You might set a live trap to see what you catch. Dog food, cat food, or peanut butter will attract the critter. We had several families of coons using the storm sewers as highways when we lived in Aransas Pass. I caught a coon or possum every night over a period of six months when we lived there. I usually had two cups in the cage, one with bait, and one with water, just in case it was a few hours before I got to them. We'd travel at least five miles out of town to release them. And even then, I'm not sure if they found their way back.