Paul was tragically killed on Saturday night (30 November) in a terrible car accident, along with friend and driver Roger Rodas, after the pair attended a charity event in Los Angeles.
An autopsy has now concluded that the 40-year-old Hollywood actor died from a combination of "traumatic and thermal injuries", while Roger died on impact.
Condolences for the Walker family have been flooding in since the weekend from fans, friends and celebrities alike.
The Fast & Furious stars have been particularly vocal about how saddened they are by Paul's death and yesterday (4 December) the team released a heartfelt tribute video to pay their respects, consisting of various scenes taken from the five films Paul appeared in.
Running at just over two minutes, the visual shows cast members Tyrese Gibson, Vin Diesel, Ludacris, Michelle Rodriguez, Dwayne 'The Rock' Johnson and more acting alongside Paul, as he plays undercover policeman and street racer Brian O'Conner in the famous action movie series.
In the background the haunting song 'Coming Home' by Diddy and Skylar Grey can be heard and the final scene of the tribute video sees Paul resting beside a car with the words 'In Loving Memory' written above his head.
Actor and R&B singer Tyrese counted Paul as one of his closest friends and has made no secret of how upset he is.
He has flooded his Twitter and Instagram page with messages to his late "brother" and even shared a prayer from a bishop on Tuesday (3 December), as well as two short video clips of Vin speaking to fans at Paul's crash site in California on Monday night (2 December).
Tyrese captioned the Instagram video: "My brother speaks for my brother #VinSpeaks".
Earlier this week, Paul's family issued a statement thanking fans and friends for their support. They also asked that instead of gifts and flowers, donations be made to Paul's charity, Reach Out Worldwide.