The stepdaughter of a Texas doctor arrested for several overdose deaths was found dead Sunday morning in a creek.

The body of 17-year-old Mikayla Mitchell was discovered floating in the water at a South Dallas park — less than a week after her stepfather Howard Diamond’s arrest, according to the Dallas News.

Authorities are treating the case as a homicide investigation, but the details surrounding her death have not been released.

Diamond, 56, was arrested July 11 for allegedly conspiring with others to write drug prescriptions for highly addictive substances since 2010. Authorities said Diamond contributed to the deaths of at least seven people in several states between 2012 and 2016. He faces charges that include conspiracy to distribute controlled substances, news station KXII reported.

Diamond’s lawyer Peter Schulte said the death and his client’s arrest were unrelated.

“Media is ruthless,” Schulte wrote on Twitter. “There is no connection between my client Dr. Diamonds’ charges & his step-daughters death.”

The Sherman doctor is in custody at Fannin County Jail in Bonham, more than 70 miles from where his stepdaughter was found dead.

Friends remembered the teen Tuesday as “so fun” on social media and called for her killer to be found.

“I hope whoever did this to you gets their karma,” friend Taylor Hope wrote.