law: Indian Evidence Act, 1872 
  27. How much of information received from accused may be
  
  proved
  Provided that when any
  
  fact is deposed to as discovered in consequences of information received from a
  
  person accused of any offence, in the custody of a police officer, so much of
  
  such information, whether if amounts to a confessions or not, as relates
  
  distinctly to the fact thereby discovered, may be proved.