Getting into a property with a locked hidden deadbolt.

[Shane Rawlings]

I am in the process of evicting a tenant who, when contact has been attempted, will not come to the door. 

When I attempted to post notice on the inside of the door I noticed the inside deadbolt with no exterior access was locked.

My concern is that on the day the constable shows up the tenant will lock herself in the residence again and not open the door. They are there, I can hear them inside. I called a locksmith and he said there was nothing he could do.

My options if no windows are unlocked are to break a window, kick open the door, or someone suggested I could possibly use a flexible saws all blade and cut the bolt itself through the gap.

Any suggestions, cheaper the better, would be appreciated.