This undated photo shows the Olympic champion swimmer Michael Phelps promoting his new book,'No Limits: The Will to Succeed'. He will not face prosecution over a photo showing him smoking marijuana at a party last year. [Photo: sports.sohu.com]


After being exonerated possible prosecution following his taking marijuana scandal popped up late last year, the Olympic champion swimmer is throwing all his energy into promoting his new book, 'No Limits: The Will to Succeed'.

Richland County Sheriff Leon Lott said this Monday there wasn't enough physical evidence to bring charges against Phelps, according to foreign media reports.

"Having thoroughly investigated this matter, we do not believe we have enough evidence to prosecute anyone that was present at the November party," Lott said in a statement.

Phelps paid high price for his "regrettable" behavior. The USA Swimming team has banned Phelps for three months over the "bong" photo controversy and that cost him an endorsement deal with U.S. food giant Kellogg Co.

The 23-year-old international swimming idol admitted "It was a mistake" and promised he won't make  again in a statement.

Michael's autobiography was published in December 9 last year. In 'No Limits' Michael reveals the secret to his remarkable success, from his training regiment to his mental preparation, and, finally, to his performance in the pool.

He also shares anecdotes about his family, his coach, his passion for the sport, and lessons learned from unexpected challenges and obstacles. (Northeast web)