Here is one for you. Take a good look. No bullet holes , no car impact wounds , no outward problems. Look again. Do you see any fish remains ? Yep - dumped a bunch of fish from an ice chest that cousins were supposed to pick up but forgot. A few days after no ice and they were ripe. Dumped them in this location and came back in a week. Nothing added to the fish (no poison). I guess he ate to much or got a bone stuck.