IsItBullshit: If they can't find a body, you can't be charged for murder no matter how clear it is that you did it

Some years back I saw a (very alarmingly thorough) post on tumblr about how to effectively hide a body to guarantee that it's never found and they ended the post by saying "no body=no charge". Is this true? Even if its glaringly obvious that you did it, like bloody-clothes-&-knife-found-in-your-house obvious, is the police SOL if they can't find a body to prove that the person is even dead?