VF, that looks like collateral.... I hunt a lot, even do it professionally, and that looks like what was left of the bullet after it went through another deer or tree.... Or one of those guys who gets off a few good brush shoots every year...

Most likely, I'd wager that was from shooting the doe or buck in front of them, with the bullet passing all the way through. For it to be mushroomed like that, it had a lot of energy when it hit something, and if it was .30 cal, it didn't do that in her leg. It would have blown it almost off, even a 30-30. If it had been a long distance, it wouldn't have been so distorted, and the bullet, to not pass through such a thin spot of the deer, had to be moving slow. As a guide, I've seen this happen three times. Two times I had to call the Parks and Wildlife, as there were two animals on the ground, and the hunter shot despite my objections... You just can't shoot something and expect the bullet not to pass through. Penetration is it's job. One incident was a cow elk. She was a small cow, and the magnum the guy was shooting went completely through her and killed a young bull on the other side of her that wasn't even legal... I spoke up to the guy, asking him if he was sure he wanted to take the shot, as there were elk behind her, and she was a small cow.... his reponse was pretty hateful. He'd been a "Screwy Richard" the whole time he had been in camp, so I let him take the shot.... As soon as the cow went down, the bull jumped and kicked, trotted about 20', then turned and sat down, falling over. The guy's 300WM took two in one shot, no problem....
I, on the other hand, didn't take any displeasure in calling Parks. I didn't even field dress 'em at that time. I walked up the hill, turned on my cell, I gave my guide license number to the dispatcher, and my Lat/long, and sat down up the hill from the guy. If I'd had a cigarette, I might have smoked it. I was ticked. The guy kept walking up to me and then back down to the elk, then threatened to walk back to camp. What a dipstick. The warden showed up right at an hour later, and he issued the guy tickets, impounded the bull, and asked me to help him load 'em. I didn't get a tip that go around..... but the game warden was nice enough to share the cow meat with me. That was good....... Stupid hunter was banned from the state permanently. Job well done. He was a jerk.....