A man on trial for an armed home invasion in Emyvale, P.E.I. has pleaded guilty to trying to fabricate evidence.

Wayne Cheverie - custom

P.E.I. Supreme Court Justice Wayne Cheverie called the letters fabricating evidence in Derry Bird's trial 'outrageous.' (CBC)

Derry Ian Bird is on trial for armed robbery during a home invasion last year in Emyvale.  He's already serving a three-and-a-half-year prison sentence for drug trafficking.

In the course of that trial, two letters written by Bird between May and July this year were presented to Supreme Court Justice Wayne Cheverie. Bird wrote them while he was an inmate in the Provincial Correctional Centre. He asked a fellow inmate to smuggle them out.

The letters were addressed to two women who planned to plead guilty for their roles in the Emyvale home invasion. One of the women was Bird's girlfriend at the time. The women had confessed to police and had agreed to testify at Bird's upcoming trial.

Bird wrote this in a 12-page letter to his girlfriend.

"Testify against me and you'll lose me forever and be known as a 'rat.' All you have to do is get up on the stand and tell the court that you told the cops a complete lie."

The other letter said much the same thing.

Neither letter made it to the intended recipients. Jail guards found one of them and police confiscated the other.

Cheverie added another year to his prison sentence for attempting in the letters to fabricate evidence.

Both women stuck to the version of events they told police, and testified in court last week that Bird robbed a drug dealer at gun point.

Cheverie called Bird's conduct "outrageous."

Bird's home invasion trial is still underway, and resumes next week.