As mentioned previouslt, the key, will always be the best tool for opening a locked door, but I wouldn't discredit Squelchtone's option, either:
squelchtone wrote:I still think a Mossberg 500 would do a good job, and quickly.
And. while I would agree that this would certainly get the door opened in a quick and easy manner. You may be interested in minimizing the splintering of the surrounding door.
With that in mind, I might recommend these tools*, not sure if they are available in your area, but I'm sure you can order them off the Internet.


Note - These tools are only representations of the tools you could use. I am not a spokesperson for Milwaukee Tools, or any of their affiliate companies.

Here's some handy instructions, too. I believe there's a video link on one of the follow-up posts, incase the instructions are hard to follow:
http://www.lock-picking.net/BLOG/post/H ... -lock.aspx*Disclaimer: Using these tools is definitely going to void the warranty on that lock, and possibly violate a few local laws in your area. Use at you own risk! Also, be sure to acquire proper training on the use of these, and any, tools. And always wear your safety glasses!