It's difficult to tell how your opossum friend would do in captivity or whether you'd stand a chance of taming it, I suppose. But there are live traps you can get to capture such an animal. (We once got one to capture a racoon that was laying waste to a decorative pond we had at the time.) Sometimes local animal control officers have them available & you can rent one at little or no cost.

I've seen a couple of programs on the PBS TV program "Nature" on how the ever-increasing incursion of human civilization into formerly wild areas is causing more-&-more wild animals to adapt to life in urban centers. One interesting phenomenon that is apparently occurring is that species that used to be active during the day are becoming nocturnal since there tends to be less human activity at night.

Thanks for caring...