KAM, I was thinking--I sent the Gunman into a coffee shop with the Swimmer and the Runner listening in. I want him to meet with somebody and suggest that he may have been the killer, hired by the one he's meeting. It would be nice to use Reidar in this instance. The thing would be that Reidar contracted the Gunman for something, which may have been the murder in Tyrion. Granted, I do have an idea for what it could be otherwise (specifically, that he had the Gunman kill key political dignitaries in a "Dogverse" to incite a civil war and keep that place off the squirrels' back) and wouldn't want to negate the idea that Reidar could be the actual Tyrion killer (just add a wrinkle that he may have contracted it, or may have done it himself).
All the bad things in life only help you appreciate the good even more.