A conspiracy theorist has been found dead in Poland — just days after he texted his mom instructing her to “investigate” should anything happen to him.

Max Spiers, a 39-year-old father of two, was found dead on a sofa in Poland, where he had gone to give a talk about conspiracy theories and UFOs.

He was ruled to have died from natural causes despite no post-mortem examination being carried out on his body.

But his dark investigations into UFOs and government coverups may have made him enemies who wanted him dead, says mother Vanessa Bates, 63.

In a chilling text message to his mom just days before his death, Spiers wrote: “Your boy’s in trouble. If anything happens to me, investigate.”

Originally from Canterbury, Spiers was a former classmate of Orlando Bloom.

He lived in the United States for a few years but returned to the UK to stay with his mother, before jetting off to Poland.

Bates said: “He was making a name for himself in the world of conspiracy theorists and had been invited to speak at a conference in Poland in July.”

“He was staying with a woman who he had not known for long and she told me how she found him dead on the sofa.”

“But I think Max had been digging in some dark places and I fear that somebody wanted him dead.”

Spiers’ pals have claimed that he “vomited a black liquid” when he died in a Warsaw apartment.

Speaking to Project Camelot, friend Miles Johnson said: “A person has died here and I don’t think it’s good enough [that] somebody who just took normal medication should end up vomiting, spewing black liquid, whatever it was.

“And then shortly after that, whatever length of time it was, died.”

Max made a career out of investigating UFO sightings and alleged coverups.

More recently, he was said to be probing into the lives of well-known figures in politics, business and entertainment.

His unexplained death, and its subsequent treatment by the authorities, has left many online followers convinced he was killed by government agents.

Conspiracy theorists have long been convinced that UFO chasers who get too close to the truth are “bumped off” by the secret services or so-called men in black.

On one website, Project Camelot, a blogger wrote: “The entire circumstances are suspicious and I urge everyone to encourage the release of details about what really happened and call for an autopsy.”

Another, Craig Hewlett, added: “If it wasn’t true what he talks about then why would they kill him? Healthy people don’t just get sick and die, they get poisoned.”

Bates, an English teacher, also buys into the theories.

She said: “Max was a very fit man who was in good health and yet he apparently just died suddenly on a sofa.”

“All I have is a death certificate from the Polish authorities that it was from natural causes, but no post-mortem was done so how can they tell that? They are also refusing to release any paperwork about it to me because, absurdly, I don’t have his written permission.”

Spiers was buried in a Canterbury cemetery after his mother arranged to have his body flown home a week after his death.

A post-mortem examination was carried out by a pathologist in east Kent, but Bates says that more than two months later she still does not know the result, or whether there will be an investigation.

She added: “Apparently, he had not suffered any obvious physical injuries but he could have been slowly poisoned, which is why the results of toxicology tests from his post-mortem are so important.”

“He has a brother, Josh, and sister, Becky, who are both devastated, as are his two boys. We all want answers to this and I will continue to fight to get to the truth.”

The North East Kent coroner’s office would only confirm the death was at the “very early” stages of their investigation.