don't forget to check the interview of the witness, so you get the details of the getaway car. (after checking the clues)

  grep <Witness> people

compare to

  grep "SEE INTERVIEW" streets/*
 

also, you can add

  grep -B2 -A3 Blue

based on that inverview to your second line. once you check the interviews of the two suspects left, you won't have to guess anymore :)