The jury is presently in deliberations over the charges of 14 counts of securities fraud and conspiracy against the defendant.
In the final part of the government rebuttal, US assistant attorney Jonathan Streeter contested claims made by defense attorney, John Dowd, that government witnesses told lies on the stand.
"This is not true. . . they didn't lie. . . they told the truth," Streeter told the jury.
The government presented several witnesses, including two Indian-Americans, Anil Kumar, former director McKinsey and Co and Rajiv Goel, a former executive at Intel Inc.
They had pleaded guilty and testified against Rajaratnam.
Streeter said that Dowd's logic suggested that cooperating witnesses were lying about committing crimes that they didn't commit.
"That's absurd," he said.
"People don't admit to elaborate crimes that they didn't commit."
During his closing argument, Dowd
Hedge fund billionaire Rajaratnam indicted
Rajaratnam gained $36 million from insider trading
Tipper X in Rajaratnam case; bail bid turned down
Wall Street scam: Rajaratnam pleads not guilty
Inside trading: Rajaratnam faces new charges