Melissa Rivers to sue doctor who performed biopsy on Joan Rivers

Melissa Rivers, daughter of late comedienne Joan Rivers, is planning to sue the doctor who performed the unauthorized biopsy on her mother.

The doctor is suspected of triggering the 81-year-old's death by performing the biopsy which was done during a routine procedure.

A source told the New York Daily News that the doctor noticed something on the star's vocal chords and decided to perform the biopsy. This was all done inside a Yorkville clinic and the source says "A biopsy like that should only be done in a hospital setting."

Rivers was rushed to Mt. Sinai Hospital in New York City and put in a medically induced coma for a week until her family chose to take her off life support.

This is the same physician who reportedly took a selfie with the comedienne while she was under anesthesia.

Right now, the New York medical facility is still under investigation but the doctor continues to see patients.