There are many websites like peoplesmart, intelius.com and people searching.com to help you locate someone.
You can but you can only sent it to people that you recently met.
A full name and any other details you have.
To mark the spot someone jumped off the bridge so coastguard can locate
Footprints can tell you that someone or something was there, if they are warm someone or something was there recently. If the footprints are fresh then you can find DNA/Cells in them that help you identify people.
it depens who you are looking for ,, if you go there just any taxi guy and they will tell you ,, they know most of the people who live there .. who are you looking for??
Phone them
The only people with the authority to do that - are law-enforcement agencies. You, as an individual do not have the right to trace the location of someone's phone, and attempting to do so could land you in court! If you mean to help someone find their phone, then you can just call them and see if you can hear it ring.
Someone just made that up recently, or few people knew about it; because it's the first time others have heard of it.
Interview people you have encountered recently.
At first they believed they had found the body of someone who had been recently murdered, but there were no missing people who matched the description of the body.
This answer varies. People who have accounts here on WikiAnswers can view recently asked questions, and answer them for trust points. So it all depends, really.