Now that you've killed someone (full disclosure: on the page!), what do you do next? That’s a question I ask myself all the time. Since I’m working with a coauthor on a fairly procedure-heavy mystery, complete with dead body, we need to make sure that when we show the death scene being investigated, we do it accurately. So I was very happy to run across this source on How Stuff Works. It covers finding, understanding, and documenting the evidence. All very CSI.
There are a bunch of other fun links, from autopsies to lock picking to luminal to money laundering.