It came out later that the private investigator was scamming Elon Musk, and lied to him about finding damaging information. https://www.theguardian.com/technology/2019/oct/08/elon-musk...
Bizarrely, Unsworth's lawyer was L Lin Wood, famous for later apparently having a mental breakdown and supporting conspiracy theories accusing chief justice John Roberts of pedophilia and murder, and being asked to undergo a mental examination by the state bar of Georgia.
L Lin Wood's handling of the Unsworth trial was widely panned as incompetent. Unsworth is clearly a hero, and Musk inserting himself into that situation and permanently tainting Unsworth's name was unconscionable.
https://reason.com/2020/12/31/pro-trump-lawyer-tries-to-impl...
https://reason.com/2021/01/31/treating-lin-woods-wild-conspi...
https://www.businessinsider.com/elon-musk-defamation-win-mis...