The mother and grandmother of Tameron Rose expressed relief and gratitude after a western Newfoundland jury found Jeffery Tippett guilty of causing his death in 2007.

Jeffery Tippett was found guilty on Friday night of manslaughter in the death of Tameron Rose. (CBC)

"After four years, I can finally breathe," Maria Rose, Tameron's mother, said outside a Corner Brook courtroom after a Supreme Court of Newfoundland and Labrador jury returned its verdict Friday night, ending a saga that has involved mistrials and several unusual turns.

Tippett was found guilty of manslaughter in the case, in which the Crown relied on a series of medical experts to show that head injuries to 11-month-old Tameron Rose could not have been accidental.

Tippett's former partner had been the young boy's babysitter. Tippett's defence said the injuries were accidental, and Tippett, who had originally been charged with second-degree murder, had told investigators the boy had injured Tippett's shoulder when his head hit it.

Maria Rose described what it had been like to see her baby's killer during the trial.

"[It was] very, very difficult to be in the same room," she said. " I wanted to know what was being said, and somebody had to be there for Tameron."

Grandmother Evelyn Rose attended all 21 days of testimony.

"We had to be there for Tameron. Nothing else," she said. "He was the innocent in all this. It should never have happened."

Maria Rose says she found it 'very, very difficult' to be in the same room as Tippett. (CBC)

Tippett possibly faces a life sentence for the conviction.

A date for a sentencing hearing is expected to be set on Tuesday.

Meanwhile, Tippett is awaiting trial on charges that led to his first trial being halted, when — police claim — he pretended to be Maria Rose while posting on a Facebook wall that he was innocent.

Tippett's first trial was stopped in its tracks in 2009 when his lawyer at the time, Gary Kearney, asked to be removed from the case.

Tippett was subsequently charged with obstructing justice, fabricating evidence, impersonation, breach of probation and mischief.

At the second trial, in 2010, a mistrial was declared when Crown and defence lawyers learned that they had not had prior access to all the evidence collected during the Royal Newfoundland Constabulary investigation.