No Jail Time for Cooperating Witness in Galleon Case One of the cooperating witnesses in the government's multiyear crackdown on insider trading was sentenced to probation on Thursday for his role in the Galleon Group's scheme, after a federal judge concluded that his assistance merited a suspended sentence. Anil Kumar, a former top partner at the prestigious consulting firm McKinsey & Company, was a crucial witness for the government in its prosecution of the hedge fund manager Raj Rajaratnam and the former Goldman Sachs board member Rajat K. Gupta. Mr. Kumar was sentenced to two years" probation and ordered to forfeit $2.26 million for his ill-gotten gains. In addition to providing crucial investigative leads to prosecutors and the Federal Bureau of Investigation, Mr. Kumar also testified at the trials of both men, who were convicted on multiple counts of insider trading. During the sentencing, Judge Denny Chin of United States District Court made a strong statement about the importance of cooperating with the government. During both trials, Mr. Kumar was often contrite, expressing his sorrow over getting involved with Mr. Rajaratnam in the insider trading ring. Mr. Kumar's testimony was filled with important details, including specifics of conversations, meetings and memos dating back years. Though he often butted heads with defense counsel, he rarely came across as hostile on the stand. Trial prosecutors praised Mr. Kumar as one of the most effective witnesses any of them had ever worked with in a securities fraud case. "Kumar's testimony was nothing short of devastating," the prosecutors noted in a sentencing memorandum for Mr. Kumar. Kumar was credible, precise and fully corroborated. Mr. Rajaratnam was convicted last year and later sentenced to 11 years in prison. Mr. Gupta was convicted in June and has yet to be sentenced. Mr. Kumar's cooperation was almost immediate, prosecutors said. He quickly began to detail how he tipped off Mr. Rajaratnam about inside information on various clients, like Advanced Micro Devices and eBay. All told, Mr. Kumar was paid more than $1.7 million for his tips via an overseas account registered in his housekeeper's name. Mr. Kumar was the first person involved in the scheme to cooperate. Though he had known Mr. Rajaratnam since the two attended the Wharton School of Business together in the 1980s, he only began slipping him confidential information in the mid-2000s. Initially, Mr. Rajaratnam suggested that he pay Mr. Kumar a salary of about $500,000 a year for his advice and guidance. There was no mention of insider information. But as time progressed, Mr. Kumar testified that he felt that he owed something to Mr. Rajaratnam for his generosity, and fell prey to the billionaire hedge fund manager. Soon, he was calling the Galleon Group founder with hot tips on mergers and layoffs of various companies. One particularly good year, Mr. Rajaratnam gave him a $1 million bonus. During trial, Mr. Kumar said he was torn about his transgressions. He knew he was committing a crime and had violated the trust of his consulting clients, but he said he wanted the money and favors a man like Mr. Rajaratnam could bestow on him. In October 2009, after he was told by the F.B.I. that he was under arrest, Mr. Kumar fainted. During Mr. Gupta's trial, Mr. Kumar offered testimony that contradicted the assertions of defense lawyers. He spoke about the business ties between Mr. Rajaratnam and Mr. Gupta and offered clarifications about the timing of conversations. His testimony helped undermine defense arguments that sought to minimize the connection between the men.