here's an idea! get a live trap and catch a opossum, then tie it to a stake with a short leash over night. put a trail camera or just stick a cam corder on a tri pod and wait. then post some sweet pictures of this unknown animal devouring a opossum!
I don't know what eats them but what ever it is set one out at my house so it will eat the one I shot the other night on the edge of my yard. I rode by it on the lawn mower today and about puked!!!