UPDATED | July 18, 2017 4:45 PM

DALLAS (CBSDFW) – A body found floating in a creek in the 3000 block of Rochester Street near William Blair Jr. Park this weekend is the stepdaughter of a doctor accused in multiple deaths.

The Dallas County Medical Examiner identified the woman as Mikayla Mitchell, 17, from Sherman. Police said they’re investigating her death as a homicide.

Her stepfather, Dr. Howard Diamond was arrested last week. He’s accused in the deaths of at least seven of his patients, and is under investigation for several more.

Prosectors said he prescribed unnecessary painkillers, which led to overdose deaths. Diamond is also accused of Medicaid fraud.

He’s based in Sherman but saw patients who live as far south as Collin County.

Dallas police say a body was found in a creek near William Blair Jr. Park. (Gabriel Roxas/Twitter)

Police ask that anyone with information about her death call police immediately.

Crimestoppers is offering up to $5,000 for information leading to an arrest.