Friends of Boris Nemtsov have published a report on the details of how Putin sent Russian troops to fight in Ukraine — something like what Nemtsov was reportedly working on when he was assassinated.

The report is a summary of information already published, and doesn't contain surprising new recommendations. I don't think anyone would have had Nemtsov killed to avoid the publication of a report like this. Thus, I wonder whether Nemtsov had other information that died with him.