Probably hadn't really thought through the specifics of tossing evidence. Bodies of water are popular for disposing of things, because it's a huge PITA to find

Probably hadn't really thought through the specifics of tossing evidence. Bodies of water are popular for disposing of things, because it's a huge PITA to find things there. Imagine how hard it might be in a large local pond, and then multiply that in complexity for a rather big river. Or an inland sea like the Great Lakes. Don't even multiply for those; it's a stupidly big irrelevant number.