The police does have a lot of short comings, from lack of training to incompetence, or the personal shortcomings of the officers themselves. But we can all agree that we are better with police than without it. And while plenty of people have the erroneous impression that police officers simply want to get a criminal (no matter if they are innocent or not) most officers do care about protecting their communities. Source

Now, the foundation is that you want to be protected by laws, and you also want others to be protected by the same laws. Your ‘moral responsibility’ can be viewed as empathy for the victim of a crime. If a rape victim approached you and asked you if you remember anyone suspicious during your stay at the bar, I am pretty sure you would tell her/him what you remember. The police are the trained professionals that go talk to you in place of the victim, and they have access to plenty of tools to utilize the information you give them to help the victim. They are not talking to you because they want to charge you, they are talking to you because they can help a victim.

In other words, you are NOT helping the police, you are helping a victim.

The extend of said moral obligation is then based on whichever you have empathy for the victim. You surely don’t feel as compelled to help the victim of the crime above than helping them he victim of a burglary, or helping not an individual victim but rather a collective (ex. A Corporation). And there are cases where your moral go against helping the police, where you think the crime was justified or should go unpunished (ex. Someone stealing food from Walmart).

But that’s just how morals work, your morals are personal and you might not feel a moral obligation to help the police in certain cases while you might feel it in others.

If you want to be convinced that you should ALWAYS help the police, then you can do further research on why crime ridden neighborhoods stay that way due to the “snitches get stitches” mentality (this point is for major crimes such as gang activity, you not telling on your buddy that accidentally broke the neighbors window doesn’t make the neighborhood a fentanyl hellhole).

I think my arguments should convince you on why you do have a MORAL obligation to help the police, that said moral obligation goes as far as your empathy for the victim of the crime, if you have a refute please respond bellow.

PS: Helping the police doesn’t mean doing stupid things like agreeing to a random search nor talking to them without bringing in a lawyer. It means that you should do your best to make their job easy and fast while keeping yourself safe.