Guy Has Bench Warrants And Is Hiding In A Friends House Wasting Away And Doing Nothing About It!

So, I know someone who is living in a friends house that has bench warrants. I don't think they are felony level. He's sponging off my friend and not paying rent and has been staying there for about two years now. The guy is basically not doing anything to improve his life, probably because he's scared to because he might get picked up and taken to the courts and maybe jail. I'm thinking this is no way to live. My friend is complaining about this guy's lazy attitude towards rent or even doing something around the house to make up for not paying rent. I'm not really involved but it's grinding my gears! Why isn't this guy wanting to face the music so he can move forward with his life? It makes no sense to me.

Is there anything I should do? Should I call the cops and let them know where he is? Or do nothing?