[snowwrestler]

The key to understanding this case is to understand what "duty" means.

It can mean that doing, or not doing, something can allow other people to sue or prosecute you. For example, we all have a legal duty to not drive drunk. If you do that, and kill someone by accident, you can be prosecuted and sued.

This is a legal definition of the word "duty." In this case, it means that a police officer who declines or fails to assist, does not need to fear getting sued or prosecuted.

But "duty" can also mean that you were hired for a certain job, and your employer expects to you meet those obligations. This is more of a cultural definition. For example a cashier has a duty to return the correct change. If they fail that duty, you can't sue them personally. But their manager might fire them.

In that sense, police officers do have a duty to help the public. An officer who blatantly and needlessly declines to do so might not get sued, but they'll probably get fired.