a murder suspect with links to the MoB.
The murder suspect couldn't explain away his fingerprints at the scene.
Obviously, it wasn't possible to recreate all aspects of the case, like the adrenaline rush of running after a murder suspect, or the chaos of so many people moving through the same space.
To extradite Mr Lugovoi or try him at home would be kowtowing to the West (and betraying a KGB ex-colleague); by doing nothing, he may seem to be protecting a murder suspect.
Police have already identified 10 murder suspects.