Mark's Pov:
(No...
No...
Something is missing...
If I am not wrong, John came to the police station for some other reason and I am sure he is misleading us in the wrong direction...
And most importantly he takes a very arrogant daring step by entering into the police station to kill Lucas by poisoning the food and he attacks the delivery boy too...
Did he really kill Lucas just to take revenge on him?
Does it mean he risks his life to take revenge on Lucas?
Does it mean he is least bothered about his life?
No...
It doesn't make sense...
Because he is the one who trapped Lucas in the airport and blocked him from the cops with all the proof and pieces of evidence. If he really wants to take revenge on Lucas by killing him then he might have killed him when Lucas is under his shelter.
So, there must be something more important reason behind his daring step.