Paul Walker death caused by ''speed, and speed alone'' - NOT mechanical issues
Paul Walker's death crash was not because of mechanical problems, according to investigators.
The Porshe Careera careered into a telegraph pole killing Fast & Furious actor Walker and driver Roger Rodas because of "speed and speed alone", said a police official.
Debris was also ruled out as a cause of the tragic accident, which shocked the world on November 30.
Traffic investigators have not released the speed they think the car was travelling at as they are still waiting for Porshe engineers to extract the information from the car.
Reports in the US say three black boxes have been recovered from the car's shell.
One will be able to tell the last speed recorded and whether the airbags were deployed, while the other two will give information on the throttle and engine readings.
The beloved Fast & Furious actor, who died on November 30, wasn't killed from the impact alone but suffered fatal burns.
Paul died alongside driver and pal Roger Roads after he lost control of his 2005 Porsche Carrera GT, which slammed into a telegraph pole and then burst into flames.
Family members will get some closure from the death certificate, which was published by TMZ, as it says the death would have been rapid.
Roger also died from "multiple traumatic injuries," but according to TMZ there were no burns linked to his death.
On Friday the grieving family and friends of actor Paul Walker attended a small and intimate funeral service for the star.
Those attending the private ceremony gathered under a green awning to avoid the bright sun. A picture of the actor could be seen.
The service - which family members wanted to be extremely private - lasted about 45 minutes. It was held two weeks to the day after the 40-year-old perished in a car crash.
The star died in a blaze when a car he was travelling in crashed into a pole on November 30.
Paul's Jiu-Jitsu teacher Ricardo Miller, who guided him in the combat sport for nine years while working on the 'Fast & Furious' films, has commemorated his late friend by bestowing him with an honorary black belt.
He wrote on his official website: "[Paul] was determined to become a black belt. He said, 'I will get my black belt, even if I need to get it in my coffin.' Now in the wake of his death, I would like to reward Paul Walker the black belt that he wanted so much during his life."
It has emerged that Paul's death could have been caused by road bumps, his family and stunt experts say.
Accident reconstruction experts have told how a car approaching 90 MPH can lose traction after hitting the reflective plastic markers.
The speeding Porsche may have hydroplaned on the markers - called Botts' Dots - which are laid down to separate traffic lanes.
On contact, the handling of the vehicle is severely affected and would have felt similar to driving the sportscar on ice.
Stunt experts believe it could explain why driver Roger Rodas would have lost control behind the wheel, according to TMZ.
