Ha, but the boot prints in the snow...or was it the mud? That's how they caught a very notable killer in Ontario a few years ago. Colonel Russell Williams, in charge of the biggest Air force base in Canada. Amazing, He was a killer and a fetichist, would go to woman's house, undress and dress up un HER undies and take selfies. The last time he barely entered a residence, when the young lady returned earlier than expected. There was a fight, he killed her.