A lawsuit was filed against Musk on Monday accusing him of manipulating the markets in order to get a better deal.
Giuseppe Pampena, an investor, accused Musk of trying to lower the firm's share price and secure a better deal by changing his mind about buying the company.
According to the class action lawsuit filed Monday in federal court in San Francisco, Musk's statements and behavior were intended to "create doubt about the deal" and drive down the share price of the company.
The original deal is estimated to be $11 billion.
The lawsuit said that Musk had no intention of walking away from the deal and was bluffing all along.
He was accused of fraudulent and illegal conduct.
The law firm representing Musk did not reply to Forbes.
In April, Musk offered to buy the micro-blogging site for $44 billion, but later backed out. The number of fake or bot accounts on the platform was one of the issues he slammed the firm over. The deal was pushed through thanks to the lawsuit. In October, Musk agreed to honor the original terms of the deal if the litigation against him was dropped. The billionaire's deposition has been delayed to allow both parties time to work out details.
$218.6 billion. Forbes says that Musk is the richest person on the planet.
Musk was sued over a fraudulent buyout flip flop.
The week was weird, with a deal on the way, and stock tanks going up.