Analysis of the endings of the game (Driver: Parallel Lines)

So a great game driver parallel lines great physics, this game has no competition the theme of racing/riding in the city.
Discuss the ending of the game. What happened exactly? Can anyone have insider info from the developers which explains in details.

Honestly I didn't realize until the end who is Maria, and for that it needed Corrigan, and where it eventually took...
From the video it is clear that Corrigan wanted to shoot TK