January 22, 2013 (CHICAGO) (WLS) -- Federal prosecutors in Chicago said they will ask that David Headley be sentenced to between 30 and 35 years in prison for his role in the 2008 Mumbai Massacre.
The government is not pressing for Headley to serve the maximum, life sentence.
Headley's different colored eyes are a fitting symbol of the double-agent role he has played for years.
He worked as an operative for Pakistani extremists and as an FBI informant and government witness.
Headley will be sentenced on Thursday.
We know the value of his cooperation as federal prosecutors have just filed papers laying out how long the terrorist should spend behind bars.
The horrific attack has become known as "India's 9-11".
The chief scout who did reconnaissance on each location for Pakistani terrorists was Chicago resident Headley.
According to a sentencing memorandum filed late Tuesday by federal prosecutors in Chicago, "Headley played an essential role in the planning" and "contributed to the deaths of approximately 164 men, women, and children, and injuries to hundreds more."
Read the government's position paper on Headley sentencing here
There were six Americans killed in the November 2008 attacks.
For Headley, who was taken into custody by the FBI in Chicago in 2009, "there is little question that life imprisonment would be an appropriate punishment."
But from the moment of his arrest, Headley began cooperating, according to the government.
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