The father of the woman who overdosed at beer baron August Busch IV’s mansion wants to join an existing wrongful death lawsuit against him.

Adrienne Martin’s father filed a motion to intervene in a lawsuit filed against Busch on behalf of Martin’s only child. The case claims Busch was negligent in the death of his girlfriend and seeks damages for her 8-year-old son.

The girl’s father — who lives in Springfield — is now also seeking damages.

Friends and family say Martin and her father had been estranged during her adult years.

The St. Louis County Prosecuting Attorney says her overdose and death were clearly accidental.