You need a carbon filter to reduce odor.

But first, you need to take some even more basic precautions!
The most important one for a grower to know is: BE INVISIBLE. That means not only your grow, but your lifestyle. NEVER do things that will put you in a position to be interacting with the police! Your friend made two crucial errors: The first was attracting attention of police, and the second was running from them, right to his grow room!

Definitely think very carefully before deciding if a grow fits into your lifestyle right now.