October 06, 2015 06:40 PM

The mysterious death of Kiersten Cerveny, the Long Island Doctor who was discovered unresponsive in the doorway in the doorway of a Manhattan apartment building last weekend, is not being investigated as a homicide, an NYPD spokesperson tells PEOPLE.

The cause of Cerveny’s death has yet to be determined, the spokesperson says.

The autopsy for Cerveny, 38, came back inconclusive pending further studies, including the toxicology report, according to ABC 7.

The Associated Press cited “authorities” who said Cerveny had been snorting cocaine with a man. The AP reports that surveillance videos show Cerveny and the man pulling up to the apartment building at 4:30 a.m., and that around four hours later, surveillance video showed the man and another man carrying Cerveny down the stairs.

According to the AP report, the man called 911 and stayed with Cerveny until EMTs arrived, but then left.

Cerveny’s shocked father Robert Rickenbach told the New York Daily News that she was “visiting a friend in New York City.”

Cerveny married another dermatologist in 2009, and had three children.

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