Kiersten Cerveny, a New Jersey native and Long Island-based dermatologist found dead in the vestibule of a Manhattan apartment building Sunday morning, likely died of a cocaine overdose, according to sources who spoke to the New York Daily News on Monday evening.

Kiersten Rickenbach Cerveny (Distinguished Young Women)

The findings of a preliminary autopsy are "consistent with cocaine use," the police source said, which may confirm earlier suspicions that homicide was not a cause of the death of the 38-year-old married mother of three.

"Based on the preliminary finds, we are not treating this as a homicide case," the source said. "There is nothing at this point to suggest criminal activity. We have no indication, so far, of any force issue in her death."

One man seen with Cerveny in the early morning hours on Sunday has already been questioned by police. Authorities were still waiting late Monday night to interrogate another male acquaintance.

This is a developing story. Check back with for further updates.

Patrick Lavery is New Jersey 101.5′s evening news anchor. Follow him on Twitter @plavery1015, email, and listen for his live reports Monday through Thursday nights between 6:30 and 11 p.m.