From The Department of "Things That Don't Happen In Minnesota"

With condolences to his family and friends, from the article it is pretty apparent that this was profoundly unwise:

A 24-year-old man was snatched by a crocodile in front of at least 15 onlookers as he swam across a northern Australian river with a friend, police said Sunday.

Northern Territory police said the man was with a group celebrating a birthday at the Mary River Wilderness Retreat, about 110 kilometres (70 miles) from Darwin, on Saturday when he decided to plunge into the water.

"They were watching him swim across," senior sergeant Geoff Bahnert told AFP of the group.

"And they just saw a crocodile with him in its jaws."

Police conducted a search for the man, but were unsuccessful.

No kidding. Trying to search a crocodile's digestive tract would be right up there when it comes to really futile and stupid gestures, so obviously they went with the lesser of really futile and stupid gestures, searching the river, and shockingly failed.

And it's not like he wasn't warned:

"We say to everybody it's full of crocs. It's one of the most populated rivers in the Territory, every couple of kilometres there is a large croc."

Nice place to take a swim.

If you want to swim outdoors, I suggest Minnesota: Guaranteed Croc-Free Since Last Winter.