DocTomoe

They looked at her bleeding on the ground, motionless, and said they weren't allowed to help her for "liability reasons".

In Germany, that's "unterlassene Hilfeleistung", "failure to help in an emergency", and can put you into prison for up to one year, especially if this failure to help results in someone elses death.

Let me be the first to say it: That is totally fucked up.

Everyone is responsible. The simple fact that "nobody else did anything" is not an excuse.

The one thing is that you don't have to help if you would endanger your life, but that would likely not be the case in a Kitty Genovese situation where you have more than one bystander.