Planck, an accountant for accused fraudster financier Jason Sugarman, disappeared in Los Angeles on October 17.
The vanishing led police to question Sugarman, who is under investigation by the Securities and Exchange Commission (SEC) for an alleged $43million fraud.
A SWAT team has raided Planck’s house and police have combed through a landfill for her remains, but her mystery disappearance remains unsolved.
Planck’s ex-husband believes the financier knows more about her disappearance than he has told detectives.
DailyMail.com can now reveal emails from Hunter Biden’s abandoned laptop which show Sugarman worked on a multi-million-dollar deal with the president’s son and his Chinese business partners in 2015.