NY Doctor Found Dead After Night Out in NYC: The Timeline of Events

— -- Authorities are investigating how Kiersten Cerveny, a successful doctor, wife and mother of three, died after a night out partying in Manhattan this weekend.

Cerveny lived in suburban Manhasset, Long Island, with husband Andrew Cerveny and their children. The Cervenys, both dermatologists, met in 2004 as medical residents at the Medical Center of Louisiana at New Orleans, according to their 2009 wedding announcement in the New York Times.

She graduated magna cum laude from Duke University and received her medical degree from Tulane University, according to the wedding announcement, which also noted that she had a previous marriage before Andrew that ended in divorce.

Here is the timeline surrounding the dermatologist's mysterious death.

SATURDAY EVENING:

Cerveny met friends at a hotel at 6:30 p.m. Saturday night, according to police sources.

SATURDAY NIGHT:

The 38-year-old was out until 2:30 a.m. with her friends, using alcohol and cocaine, according to police sources.

The group went to a bar on New York City's Lower East Side, where Cerveny met a man with whom she was Facebook friends, police sources said.

Cerveny and the man left the bar between 3 a.m. and 4 a.m., taking a cab to an apartment building in Chelsea, police sources said.

SUNDAY MORNING:

Surveillance video shows Cerveny and the man entering the building in Chelsea at 4:25 a.m., according to police sources, who noted that the taxi driver took them to the driver's apartment.

Cerveny was found in the apartment building lobby around 8:30 a.m. Sunday and was declared dead at Lenox Health Greenwich Village, police said.

One of the men she was out with had called 911, disappeared and called 911 again to check on Cerveny's status, police said.

PIECING TOGETHER THE MYSTERY:

There was no evidence of robbery or sexual assault, according to police sources, and bruises discovered on her neck were determined to be from a prior medical procedure.

Investigators brought in Cerveny's husband, as well as one of the men she was out with, to be questioned, but no one was arrested, police said.

When asked today whether her death resulted from an overdose, New York City Police Commissioner Bill Bratton said, "At this juncture that is the direction this case seems to be going. We have no indication based on our investigation there is any foul play suspected. We believe at this time it had to do with the ingestion of narcotics."

Police were told Cerveny consumed a significant amount of alcohol and cocaine that night. The autopsy is pending the results of toxicology tests, according to the medical examiner's office.