Well Done Detective, you examined the crime scene successfully and gathered information from the Susan's House.
You have conducted a probe at Susan's house and have found the most important evidence about Smith.
Now it's time to analyze about Smith.
So, doubt now has been cast upon on Smith as it now leads you to make an entry into Smith's house through the chimney.
Use your detective skills to find the evidences and escape from the place.
Don't give up until you catch the killer.