Why Did Kronk Pick Up the Skull of Cayley?

Cronk called the police three different times in august to tell them that he saw something weird in the forest where he'd stop to use the bathroom. When the police came out they didn't find anything, partially because it was raining,. And in december, cronk, still curious, went back into the woods and found cayley's body. The defence used this to argue that the crime scene was compromised. This is actually a really typical attack. As we've discussed before, some one finds bodies, and usually they contaminate the crime scene as they are not law enforcement. It's impossible to put things exactly back the way you found them if it's already been