SOS Apps - Design Exploration

A concept for SOS Apps. When certain combination button or fingerprint (the finger that doesn't used to unlock phone) detected in smartphone, the apps triggered. It will record in voice your situation in 20 second. After that those data will be sent to police (I assume police has dashboard web) and registered contact via email and SMS. The apps also will give you information the status of your registered contact and police. I hope those things make user less worry. Wdyt about this apps concept?