Slideshow
NYPD officers arrest an Occupy Wall St., protester in Duarte Square, NYC on Nov. 15th, 2011.
DNAinfo/Paul Lomax
NYPD officers arrest Occupy Wall St., protesters and journalists in Duarte Square, NYC on Nov. 15th, 2011.
DNAinfo/Paul Lomax
OWS protesters gather at Duarte Square on Nov. 15th, 2011.
DNAinfo/Paul Lomax
An OWS protestor looks towards NYPD police lines in Duarte Square, SoHo, on Nov. 15th, 2011.
DNAinfo/Paul Lomax
NYPD officers enter Duarte Square and begin to make arrests on Nov. 15th, 2011.
DNAinfo/Paul Lomax
NYPD riot police prepare to advance in Duarte Square, SoHo, on Nov. 15th, 2011.
DNAinfo/Paul Lomax
An Occupy Wall St., protester stands her ground at Duarte Square, SoHo, on Nov. 15th, 2011.
DNAinfo/Paul Lomax
NYPD officers arrest an Occupy Wall St., protester in Duarte Square, NYC on Nov. 15th, 2011.
DNAinfo/Paul Lomax
Senior NYPD Officers prepare to raid Duarte Square on Nov. 15th, 2011.
DNAinfo/Paul Lomax
NYPD officers arrest Occupy Wall St., protesters in Duarte Square, NYC on Nov. 15th, 2011.
DNAinfo/Paul Lomax
An OWS protester gives a sign of peace to fellow members of the coalition on Nov. 15th, 2011.
DNAinfo/Paul Lomax
A member of the Occupy Wall St. protest group calls out orders at Duarte Square on Nov. 15th, 2011.
DNAinfo/Paul Lomax
An OWS protester hangs aa "Occupy Wall St." sign at Duarte Square on Nov. 15th, 2011.
DNAinfo/Paul Lomax
The first OWS tent is pitched in Duarte Square before being confiscated by the NYPD on Nov. 15th, 2011.
DNAinfo/Paul Lomax
OWS protesters enter Duarte Square on Nov. 15th, 2011.
DNAinfo/Paul Lomax
OWS protesters begin to gather in numbers in Duarte Square, SoHo, on Nov. 15ht, 2011.
DNAinfo/Paul Lomax
OWS protesters scale walls in Duarte Square on Nov. 15th, 2011.
DNAinfo/Paul Lomax
An OWS protestor looks towards NYPD police lines in Duarte Square, SoHo, on Nov. 15th, 2011.
DNAinfo/Paul Lomax
NYPD officers arrest an Occupy Wall St., protester in Duarte Square, NYC on Nov. 15th, 2011.
DNAinfo/Paul Lomax
NYPD officers arrest an Occupy Wall St., protester in Duarte Square, NYC on Nov. 15th, 2011.
Photo Credit: DNAinfo/Paul Lomax
MANHATTAN — Hundreds of NYPD officers were due to finish their shifts Monday night when they suddenly got word that their tours had been extended.
The officers were told to head to a staging area in lower Manhattan, suit up in riot gear and join hundreds of other cops who were arriving for their regular overnight shifts and given the same marching orders.
"They thought they were going home and were as surprised as anyone when they got the word that they had a new assignment," a top police official told DNAinfo.
But this NYPD operation was anything but last minute. It had been in the works for a while, sources said.
The roughly 600 cops that marshaled in Zuccotti Park early Tuesday were part of a long-planned strategy to clear the Lower Manhattan encampment. Mayor Michael Bloomberg may have declared the final decision to act was his, but the plan to ouster the protesters had NYPD written all over it.
The plan relied primarily on time-honored crowd control strategies previously employed at large gatherings such as the 2004 Republican National Convention and other demonstrations.
The two-month encampment, however, provided the NYPD with the time to study the protesters, to gather intelligence about them and to predict the size of their group at various times of day and gauge how they would react to being evicted.
The cops also had the element of surprise and could dictate what day and time to move in.
Sources told "On the Inside" that Tuesdays and Wednesdays are the days when the greatest numbers of cops are already on duty. It guaranteed the NYPD would have ample manpower in the event of any unforeseen circumstances.
By striking in the dead of night, the NYPD not only confronted a sleepy crowd, but also the smallest possible number of protesters.
The NYPD brought in cops on the evening tour to replace those held on overtime through the day by Tuesday night.
"We had put in place plans to take action at Zuccotti Park if in fact it was going to be done," Police Commissioner Ray Kelly told NY1. "We had put that construct in place, had it on the shelf."
Slideshow
Cops and Occupy Wall Street protesters stand off at Broadway and Pine Street on Nov. 15, 2011 after the protesters were evicted from Zuccotti Park.
DNAInfo/Tom Liddy
Even though rules ban lying down, two men were spotted sleeping at Zuccotti Park on Tuesday night.
DNAinfo/Carla Zanoni
Women sat under an umbrella Tuesday after being allowed to return to Zuccotti Park.
DNAinfo/Carla Zanoni
A woman attempts to exit over a barrier at Zuccotti Park on Tuesday night.
DNAinfo/Carla Zanoni
C.J. Phillips, 50, of New York, an Occupy Wall Street protester stands on Dey Street with his belongings after the group was evicted from Zuccotti Park on Nov. 15, 2011.
DNAInfo/Tom Liddy
About 200 people were arrested near Zuccotti Park by 8 a.m., according to Mayor Michael Bloomberg.
Pamela Langford
A lieutenant wields his baton during an Occupy Wall Street march on Centre and Grand streets.
DNAInfo/Tom Liddy
The city cleared Zuccotti Park early Tuesday morning.
Pamela Langford
This note was distributed to protesters early Tuesday morning before NYPD officers cleared Zuccotti Park
DNAinfo/Jill Colvin
People get pushed by on the sidewalk of Dey Street, near Broadway after Occupy Wall Street was evicted from Zuccotti Park.
DNAInfo/Tom Liddy
Protesters pick up trash on Broadway after others dumped it on the street during a march on Nov. 15, 2011 protesting the eviction from Zuccotti Park.
DNAInfo/Tom Liddy
Sanitation workers cleared debris from Zuccotti Park early Tuesday morning.
Pamela Langford
An Occupy Wall Street demonstrator holds up an anti-NYPD sign at Broadway and Pine Street on Nov. 15 after the group was evicted from Zuccotti Park.
DNAInfo/Tom Liddy
Cops and Occupy Wall Street protesters stand off at Broadway and Pine Street on Nov. 15, 2011 after the protesters were evicted from Zuccotti Park.
DNAInfo/Tom Liddy
Protester yells on Broadway and Dey Street after Occupy Wall Street is evicted from Zuccotti Park.
DNAInfo/Tom Liddy
NYPD Chief of Department Joseph Esposito stands with other police brass behind a barricade at Broadway and Pine Streets on Nov. 15, 2011 after the Occupy Wall Street protesters were removed from Zuccotti Park.
DNAInfo/Tom Liddy
An Occupy Wall Street protester addresses the crowd at Broadway and Pine Street on Nov. 15, 2011 after the group was evicted from Zuccotti Park.
DNAInfo/Tom Liddy
Police brass stand guard at Broadway and Pine Street on Nov. 15, 2011 after Zuccotti Park was cleared of protesters.
DNAInfo/Tom Liddy
Protesters hang from a lamppost at Broadway and Pine Street on Nov. 15, 2011 after Occupy Wall Street protesters were cleared from Zuccotti Park.
DNAInfo/Tom Liddy
A police officer in riot gear stands guard near a barricade at Broadway and Pine Street on Nov. 15, 2011 after Occupy Wall Street protesters were removed from the park.
DNAInfo/Tom Liddy
Workers powerwash and scrub Zuccotti Park on Nov. 15, 2011 after Occupy Wall Street protesters were cleared out.
DNAInfo/Tom Liddy
Tony Sesay, 21, of Washington, DC, (right) yells at police at Broadway and Pine Street after Occupy Wall Street was evicted from Zuccotti Park on Nov. 15, 2011.
DNAInfo/Tom Liddy
People put trash back in a dumpster on Prince Street near Broadway after other protesters dumped it into the street during a march on Nov. 15, 2011 that followed the eviction from Zuccotti Park.
DNAInfo/Tom Liddy
A police van is ready to accept Occupy Wall Street protesters.
Pamela Langford
A crowd of Occupy Wall Street protesters rallies on Broadway, near Dey Street on Nov. 15, 20111 after they were evicted from Zuccotti Park.
DNAInfo/Tom Liddy
After evicting most of the men and women sleeping in the camp, police began to pull apart tents, tear through tarps and toss drums into piles of debris.
DNAinfo/Jill Colvin
The tent city in Zuccotti Park was torn down Tuesday morning.
DNAinfo/Jill Colvin
Cops rush to Centre and Grand Streets to deal with a group of protesters who were marching north after Occupy Wall Street got evicted from Zuccotti Park on Nov. 15, 2011. An arrest was being made by the police car.
DNAInfo/Tom Liddy
Evicted protester Colin Laws, 19, right, hauled his belongings from Zuccotti park after cops swept in.
DNAinfo/Jill Colvin
Occupy Wall Street protesters who were arrested Tuesday night were put into a police van.
Pamela Langford
A group of solemn protesters watched as their encampment was destroyed.
DNAinfo/Jill Colvin
Sanitation cleaned up Zuccotti Park Tuesday morning.
DNAinfo/Jill Colvin
Protester Stevie Bates was among the last protesters to leave Zuccotti Park. She said she was dragged from the park by police officers.
DNAinfo/Jill Colvin
Police in riot gear move through Zuccotti Park after clearing it of Occupy Wall Street protesters.
DNAinfo/David Torres
Protesters are arrested and put into a police van.
Pamela Langford
Debris is seen lining the street outside Zuccotti Park after protesters were forced from their encampment Tuesday morning.
Pamela Langford
Security was on high alert at Zuccotti Park on Tuesday night.
DNAinfo/Carla Zanoni
Cops and Occupy Wall Street protesters stand off at Broadway and Pine Street on Nov. 15, 2011 after the protesters were evicted from Zuccotti Park.
Photo Credit: DNAInfo/Tom Liddy