The girlfriend of the second victim says she played Assassin's Creed with him and wishes she had let him win if she knew he was about to die. Assassin's Creed is not a competitive game and there is no way to play against or beat an opponent.
Daniel described ultramarine blue as "a rare shade of blue paint". In fact, it is very common. Most serious painters would have it amongst their colour set and it is a fairly standard component even in amateurs' paint boxes. This inaccuracy become a pivotal plot point when the FBI finds that only one store in town stocked it and only sold it to one artists. In fact, every art store would stock it and would sell it to many people.
Kate said that Grant knew and had drawn every detail of Brennan's face but the sketch was missing the prominent lump/growth to the left of the actor's nose.