Help restoring an iPhone that I found please? I can't figure anything out

So today I found an iPhone on the city bus and now I'm sitting at home with it. I've been without a phone for the last few years so I decided to hold on to it. I've tried restoring it with iTunes but it's connected to a Find My iPhone account and I can't find a way around that. If anyone knows one please help me

Find my iphone is used to locate a lost iphone, they could get your address through the GPS function. Never keep a lost phone, always try to return it.

While I don't suggest this there's a way, now I don't suggest this because it's a lost iPhone with a " Find my iPhone application " which means they can find you if you use the phones Wi-Fi, however you will need to put the device in DFU mode, to put it in DFU mode you need to turn the device off, after it's off tap and hold the lock button, and when the screen lights up hold the home button at the same time not releasing either button until the devices screen turns black again, once it's turned black release both button and test it to see if it's in DFU mode, to test it hold the lock button and attempt to turn it on, if it doesn't turn on then it's in DFU mode. Now connect it to iTunes and it will ask if you want to restore it to factory settings. Do the restore process and wait or it to complete, you are now finished restoring the device hope this helped ~ Jake, Apple Manager