The Perfect Kill - Max Gaddis

http://www.cnn.com/2013/11/21/world/europe/europe-codebreaker-faulding/index.html?hpt=wo_t4

The body of a MI6 codebreaker named Gareth Williams was found in a locked bag in his own bathtub in 2010. The lock was on the outside, so people thought it was a murder, but some people thought he did it to himself. There was a lack of evidence, police say, to make the case a murder case, but there were no fingerprints on the bathtub to back up the theory that he did it to himself. There were no fingerprints on the padlock, the bag, the zipper, or even on the tub. Investigators say that even Houdini couldn't pull off a trick like this. Williams' whole apartment was searched and no unusual fingerprints were found. There was a scuff mark on the tub that could've come from the bag that Williams was found in. Confined Spaces expert Peter Faulding says that this means that the bag was lifted into the tub which suggests a murderer was present. He also says it was impossible for Williams to put himself into the bag because he had to touch something in order to push himself into the bag. There would've been more scuff marks and fingerprints around the tub if this were the case. 

This reminds me of those "you be the judge" books that I liked to read all the time, but this also seems like a hard case to crack if it's taken almost four years to solve. I think that they should factor in everything when attempting to solve this case because every little detail counts.