A purse and gold watch were found upon the victim: but no cards or papers, except a sealed and stamped envelope, which he had been probably carrying to the post, and which bore the name and address of Mr. Utterson. –The Strange Case of Dr. Jekyll and Mr. Hyde,
Robert Louis Stevenson

Which inference is best supported by the passage?

Sir Danvers Carew and Mr. Hyde were once friends.
Robbery was not the motive for Sir Danvers Carew’s murder.
The police know where the murderer is hiding out.