If you know a serial killer targeted you in the past, never walk home alone at night again. Unless maybe you have a former assassin-for-hire as a bodyguard, but even then. Don’t do it.
Even if the ex assassin-for-hire is super attractive, make sure he’s already with you before you walk home.
True lesson: If you know it could be sketchy, always carry mace. Always.
PS. Unless you’re in a country that shall remain unspecified *cough* across the pond *cough* like I was, where mace is illegal. Then find the nearest rubbish bin to ditch it in and perhaps find an alternative?