After examining the allegations against Conservative Party officials, the RCMP say that no charges will be laid in the Chuck Cadman affair.
The Mounties said they found no evidence to support the allegations of bribery laid out in a biography of Cadman, who died in 2005.
The announcement appears to bolster Prime Minister Stephen Harper's libel lawsuit against the Liberals over allegations on the matter.
Conservative James Moore told reporters Friday that Harper intends to push forward with the lawsuit, even if the Liberals apologize.
"The Liberals will be held accountable for what they have done," he said. "Today, the RCMP has confirmed what we've been saying. They found no evidence of any wrongdoing by the prime minister or the Conservative Party.
"Very soon the Liberals will see how big of a legal problem they have created for themselves."
Earlier Friday, Liberal Leader Stephane Dion said that Harper has yet to fully reveal what happened.
Dion says Harper should explain to Canadians what he meant in a voice recording by the biography's author that has Harper mentioning "financial considerations" from the Conservatives in regards to the Cadman affair.
In the book, "Like a Rock: The Chuck Cadman Story", Vancouver journalist Tom Zytaruk claimed that Cadman was offered a life insurance policy by Tory officials for a key vote against the Liberals.
Cadman had been diagnosed with terminal cancer at the time.
Both Cadman's widow and his daughter have said that Cadman told them about being offered a $1-million life-insurance policy.
The Conservatives have acknowledged that two party officials close to Harper, then-opposition leader, met with Cadman over his vote.
But the Tories say that they only offered a repayable loan to cover his campaign expenses if Cadman would rejoin the party.
Cadman, who was an Independent at the time, sided with the Liberals in the end, keeping then-prime minister Paul Martin in office for the remainder of 2005.
With files from The Canadian Press