I thought he was guilty - but the pathologist for the prosecution said the post-mortem findings couldn’t differentiate between suicide (hanging) or murder (strangulation) and the defence pathologist said he would have confidently stated that cause of death was suicide.It was a classic example of the defence and the prosecution both having their own experts.
However, the circumstantial evidence around it was insane. It was similar to EP in that for Polk to be innocent it needed an incredible number of strange coincidences to have happened. I would argue that there were considerably more for his trial.
IMO that was reasonable doubt, with that testimony