Jerome Corsi has written 3 indepth articles regarding Seth Rich. He has been the primary investigator on this subject, and he has access to POTUS.
We need to be patient with this. There is a reason why this is slow going. One of the reasons is that the public needs to get behind the President. It is critical that this information spreads. When people understand what happened, there will be no containing it anymore.
Here is an interesting collection of information, also worth looking at: