Nice, some corroboration and a probable solution. Congrats!
What did the Knoll assassin look like?
Were they tall or short?
What was he wearing?
Where was he standing exactly?
Was there 2 people or only one?
Which direction did they go?
JohnM
Where is the proof that the Knoll assassin owned a gun (remember order forms in his handwriting, photos, prints, confirmation of his wife etc don't cut it)
Who saw him pull the trigger?
Where did he buy his ammo?
What type of underwear was he wearing?