How do you know the author knew Near's address or employer? They were known to be very secretive about such real-life details, and in this day and age it's very

How do you know the author knew Near's address or employer? They were known to be very secretive about such real-life details, and in this day and age it's very much possible to regularly meet someone but have no idea where they actually live or work. Moreover, you're making a leap by assuming the author didn't try to save their life.