Andrew Watson Police interrogation (11-22-2014)

Andrew Watson is the "personification of evil."

That's how Justice Hugh O'Connell described Watson after he refused to reveal where he'd buried the body of 74-year-old Lise Fredette.

Watson, who turned 79 Thursday, was convicted of the first-degree murder of Fredette just moments earlier.

"Mr. Watson, the road is now over for you. If you have a heart, sir, I would strongly suggest you speak ... to put closure to this, so this family can lay this very kind, compassionate woman to her proper rest," O'Connell said.

"No thanks," Watson said.

O'Connell told Ms. Fredette's family and friends sitting in the courtroom that he "highly resented" Watson's betrayal, not only to Ms. Fredette, but to them as well for not giving them peace.

"Regrettably, it seems to me Mr. Watson is a completely, utterly empty vessel, concerned with only one thing: himself," O'Connell said.

Watson will be sentenced Monday. A conviction of first-degree murder comes with a mandatory life sentence with no eligibility for parole for 25 years.