Running from the police?

Ok so I'm on the run... At first I was really bored so I walked into a gas station where my friend works. We decided to pull a prank on the customers by me robbing the place but I accidentally shot one of the customers in the leg. My friend thought that it was an act and also thought the gun wasn't real so he shot another customer by accident thinking that she was in on it. So now we both are running from the police. Right now we are hiding out at another friends house. It's only a matter of time before they start investigating here too. What should I do? Please help!