He doesn’t need to be interviewed. They can talk to the few eyewitnesses to the event and get there take on it. Then get statements from people that say that they were there but weren’t.
After 55 minutes of pro-Brown stuff they can state “CBS invited Officer Wilson to an interview, but he refused.”
The MSM will not give Officer Darren Wilson a fair interview because they have tried him in the court of public opinion and have found him guilty. The best thing to say is “No comment”. The MSM will trash you either way, but there’s no sense in giving them ammunition.