The idea is: “alertness mode” for mobile phones. Basically when in alertness mode, some functions on the phone will change to make better use of mobile phones potential to help the police in some situations.
The new/changed functions could be:
Each picture taken could be sent directly (as fast as the hardware allows) to a remote server, preferably to the police. This would help removing anonymity in an assault or rape. The perpetrator would have to think twice before going through with his/hers illegal action, seeing as it would probably be a lot easier to identify him/her if the police has a picture. And it would be hard to stop the picture reaching the police.
The phone could start recording and streaming audio to the same server. To help the police understand what happened.
If it’s possible to get the exact position of the phone, a distress signal could be sent to the local police at the push of a single button.
Of course the idea needs some fine tuning but ill leave that to you,
and I dont know if it's a useful idea but I had to get it out of my head.