On Tuesday, BuzzFeed Newspublished two of Musk's emails in which he called a journalist who has written about the dispute a "f*cking asshole" and made new claims against Unsworth without any evidence for them.
Musk, who ended the email by writing "I fucking hope he sues me", prefaced the email with the phrase "off the record", a condition that the reporter says did not agree to prior to the email.
"I suggest that you call people you know in Thailand, find out what's actually going on", Musk wrote, according to Buzzfeed. "Musk did not provide proof of his claims to Buzzfeed News, and Buzzfeed News could not verify any of the claims after reporting on Unsworth's background". In it, he accused a British cave rescuer of being "a child rapist" who took a "12-year-old bride".
Mr Musk had earlier apologised for calling Mr Unsworth a "pedo".
"It isn't where you'd go for caves, but it is where you'd go for something else", Mr Musk wrote.
Mr Unsworth's lawyer Mark Kennedy from the firm Howard Kennedy told the BBC that Mr Musk's allegations were baseless.
Facebook, Twitter fall as they face US Congress
Bucshon also asked Dorsey how Twitter hires its employees and ensures a level of ideological diversity at the company. Mr Jones constantly interrupted Senator Marco Rubio as the Senator was trying to answer journalists' questions.
Magnitude 6.6 quake hits Japan's Hokkaido island
A series of smaller shocks, including one with a magnitude of 5.4, followed the initial quake, Japan's Meteorological Agency said. In the town of Atsuma, a massive landslide occurred on the side of a mountain, crushing houses at lower grounds.
He asserted that the city was "renowned for child sex-trafficking".
Unsworth had dismissed Musk's offer as a "just a PR stunt", and told CNN the device "had absolutely no chance of working", and that Musk could "stick his submarine where it hurts".
"Tesla is losing the United States tax credit ahead of competition, posing further challenges to affordability at a time when competition is intensifying", Tamberrino said in a note to clients Tuesday, re-instating his sell-rating after briefly suspending coverage. "After deleting the initial accusation and tweeting an apology, Mr Musk has continued to republish his false and unsupportable accusation", Wood said in a statement.
This means Musk could face jail time if found guilty in the Southeast Asian nation.
The controversy comes at a time when Tesla and Musk continue to battle intense negative publicity and embarrassing controversies.
In a note to clients Tuesday, analyst David Tamberrino reinstated his August price target of $210 for Tesla - a 30 percent drop from its current price - citing increasing competition in the electric vehicle space.
Goldman Sachs has resumed its coverage of Tesla, slapping the carmaker with a sell rating less than a month after suspending coverage to help CEO Elon Musk explore taking the company private.
Nike's Colin Kaepernick "Just Do It" ad just dropped early
It claimed Kaepernick has "sacrificed" - but the former quarterback has only become more famous since leaving the NFL . The ad concludes with Kaepernick saying: 'So don't just ask if your dreams are insane , ask if they're insane enough'.
Rafael Nadal reveals Dominic Thiem ‘sadness’ at US Open
Not only was Nadal two points from losing at 5-all in the closing tiebreaker, but he finished with fewer total points, 171-166. On this one, he managed to come back to win, although it took 4 hours, 49 minutes and never did get easy for him.
India's top court legalises gay sex in landmark ruling
It also said that the section was in contravention to Articles 14 and 15, which guarantee equality and prohibit discrimination. The lone lady judge on the Bench, Justice Indu Malhotra had said that homosexuality is only a variation and not an aberration.
Theranos: Scandal hit blood-testing firm to shut
The SEC accused them of lying about the company's abilities, financial health and connections to the Department of Defense. In March, US securities regulators accused the youthful entrepreneur of an "elaborate, years-long fraud".