Well first the 302 isn't an interview process. The 302 is the reference number for an investigative report used by the FBI to record all sorts of events not just interviews. What some people have a problem with is the policy of the FBI (and TBI I might add) not to record interviews on audio or even video. The policy has its positives as well as its negatives. The link you provided concerning Minnesota law seems like apples to oranges in this incident. This was an interview of a witness at her residence and NOT a custodial interview of a suspect requiring Miranda warnings so the Minnesota law wouldn't have changed anything about the way this interview was conducted. This wasn't an interrogation but a statement from a witness. There is a big difference in the two.

The attack of the FBI agent by Houston's attorney was a little jury grand standing since the agent isn't allowed to used whatever audio or video technology might be available at Best Buy or wherever Logan said without violating FBI policy which would have given Logan another thing to complain about. What is not being discussed in this is Watts changing her story only after telling the police that members so the Houston family came to her residence repeatedly and asked whose side she was on. She was talked to by the FBI the night of the killings and never mentioned the officers shooting first, then she was interviewed by the TBI and the original prosecutor and never mentioned any of this. After the Houston family visits she asked that no police personnel come to her residence again and then changed her story.

Another thing I find highly interesting in Watts story is that Rocky shows up at the house carrying his assault rifle in an agitated state and asks Leon if he (Leon) had seen the patrol car. Then when the patrol car pulls up to the house Rocky with rifle in hand advances on the patrol car saying "it's on now". Even by Watts on version of events the first shots aren't fired until Rocky advances on the patrol car. Watts contends that Brown fired first and even if he did where is the problem? A clearly agitated Rocky advances on the patrol car with an assault rifle in hand saying "it's on now". I'm not sure how anyone can not see that as a threatening gesture by Rocky which would justify the officers use of force. Now I personally don't believe Watts in that I think Rocky opened fire as soon as he stepped off the porch but even if he didn't fire first it was still his actions that started the chain of events.

Do you really have to ask that question? The FBI, TBI, or whatever law enforcement agency could greatly enhance their credibility with recorded interrogations. The lack of it certainly leaves the question hanging.