How to open a ford focus back door with child lock on and outside handle broken?

Hi there i have an ford focus 2008 i have the same problem below. When i bought it the back door opens from inside only. But my friend engage the child lock and i'm not able to open it now. I tried and opened the inner panel but it didn't help. Can i try to remove hinges.

Leave the inner panel off and go to a locksmith.
He's going to open it.
It won't be expensive…

If you take the hinges off would be a bad move because the door would still be latched. The only way is to get the inner door panel off so you can get to the linkage and pull the right one, or maybe get it with a slim Jim or maybe get ahold of the linkage were the handle is broke off if you can see it.