Paul Walker's Crash Site
Firefighters extinguish the fire in the car where actor Paul Walker was killed along with another unidentified man during a car crash in ValenciaREUTERS/Dan Watson

The Los Angeles county coroner on Wednesday revealed results of autopsies of Paul Walker and Roger Rodas, five days after they were killed in a car crash, ruling that it was an accident.

The coroner said that the "Fast and Furious" actor died from "combined effects of traumatic and thermal injuries" and his friend of "multiple traumatic injuries." The autopsies were in agreement with the reports that Walker was in the passenger seat and Rodas was driving when the accident took place.

The toxicology results of the bodies of the victims will take six to eight week, said Los Angeles county coroner's office on Wednesday.

The 40-year-old actor died along with friend Rodas, 38, on Saturday after their car, a Porsche Carrera GT burst into flames after hitting a utility pole and a tree in Santa Clarita, Los Angeles.

Prior to coroner's revelation of the autopsies results, several conspiracy theories, including high speed, mechanical failure and drag racing, were doing the rounds because of the severity of the damage. The officials had earlier said that they had to obtain dental records of the victims' families to identify them.

Another conspiracy theory that has surfaced is the actor might have been murdered.

An anonymous user on conspiracy forum Godlikeproductions has claimed that Walker and Rodas must have been killed for their inside knowledge about a conspiracy to supply drugs to Typhoon Haiyan victims in Philippines along with the relief items.

"Paul Walker and his friend were killed shortly after they discovered a conspiracy to supply victims of Typhon Haiyan with a prototype permanent birth control drug hidden in medicinal supplies and food aid. They had a damning recording and they were on their way to rendezvous with an ally who would have helped them get in touch with the right people. Turns out they were betrayed and someone rigged their car's breaks to malfunction after a certain speed," said an anonymous user on Godlikeproductions.

"Now that the loose end has been tied up, and the recording destroyed, the people responsible have nothing to fear as this will become another "conspiracy theory" no one will take seriously," the user added.

However, this theory doesn't hold any concrete evidence and it may end up as just another speculative theory. Sources close to Always Evolving, the shop co-owned by Walker and Rodas, told TMZ that the fatal crash could be a result of mechanical failure, citing evidence of a fluid burst and subsequent fluid trail before the skid marks at the accident scene. Moreover, Rodas was a professional racer who took part in the Porsche Cup Cars series for several years, casting doubts if he had actually lost control of the car.

There is also a drone theory linked to the death of the duo. A video released by TMZ suggested that an object appeared to have hit the car seconds before it burst into flames. However, there is no evidence to prove that any object had struck the car and it may remain as just another conspiracy theory.

Meanwhile, the video footage from a surveillance camera obtained by several media houses show two explosions taking place during the crash.

According to CNN, Jim Torp, a car enthusiast who attended the charity event where Walker and Rodas had been just before the crash, told the channel that he thought he heard a sound similar to a blast before the car slammed into a pole and a tree. He said, "What the first explosion was -- I don't know if their tire blew up, because it sounded like a tire blew on the car."

Raising skepticism over the way the powerful car was damaged, an anonymous user wrote on Godlikeproductions that "final photo of the car shows it against a tree that is only about 6 inches in diameter and the tree is totally undamaged. Cars don't hit 6 inch trees at what would have had to have been 150 mph and not damage the tree, there would not be a tree. As one member said, if you don't believe this, take your car and go try yourself at 30 mph." 

One of the popular theories regarding the Walker death has highlighted that the event appears to have a bizarre link to the TV show "Family Guy." At the core of this theory lies the idea that an organization called the Illuminati, which many in the conspiracy circles believe to be a semi-secret fraternity that influences world events and foreshadow significant events prior to them happening, foretold what was going to happen to "Fast & Furious" star. Walker had played a character named "Brian" in a movie, and this is significant to this theory because Brian is also the name of the Family Guy dog which, was unexpectedly killed in a car crash.

The death of the dog in the crash is assumed to be a way of foretelling what is going to happen to Walker, who played a character named Brian in one of his movies.

One YouTube user, Paul Gardiner even went to the extent of explaining the "Illuminati" theory in a video, which is now being removed on account of "violation of YouTube's policy against spam, scams, and commercially deceptive content."

It was also speculated that Walker and Rodas might have been involved in a drag race but the officials investigating the crash ruled out after analyzing the footage from a surveillance camera and statements of the witnesses.

The conspiracy theories on the death of the duo don't hold any water, as there is no evidence to support the claims, yet many will continue to question the manner in which they were killed, considering the severity of the crash.