Now that Brad Cooper has been convicted of first-degree murder in the death of former Edmontonian Nancy Cooper, her family is speaking more openly about their thoughts on the police investigation and the trial while Cooper's lawyer is suggesting there may be an appeal.

Nancy's father, Garry Rentz, said he thought his son-in-law's defence team did a good job with what they had.

"Some days you think, ‘Oh, gee. I didn't see something,' or ‘I missed something. Maybe I should change my mind," said Rentz.

But in the end, he said the jury's verdict was the right decision. Nancy's brother, a police officer in Edmonton, said he never questioned the investigation or believed the defence's argument that evidence was manufactured.

"I don't think there's a chance at all that that's what happened," said Jeff Rentz, Nancy Cooper's brother. "There just isn't any reason. I think that's, that, that's kind of a preposterous notion."

Nancy's twin sister, Krista Lister, said it was difficult hearing some of the most intimate details of her sister's life described in court.

"What is most important to me is how people will remember our Nancy as the wonderful mother, sister, daughter that she was and will live in our hearts forever," added Donna Rentz, Nancy's mother.

Nancy's two young daughters are being raised by Nancy's twin sister, who says the girls recently changed from calling her "Krista Mom" to simply, "mom".

Brad Cooper's lawyer said an appeal may be in the works. Howard Kurtz said his client deserves another trial. He said there were a number of issues with the evidence raised, and points to the officer who despite multiple fail-safe technology, managed to erase everything on the victim's cell phone.

"I believe that the Blackberry was intentionally deleted – that it was not the result of somebody who did not know how to deal with evidence. It was the result of somebody who was eliminating evidence, "said Kurtz.

The Cary police department led the investigation. Chief Pat Bazemore is addressing some of the issues Cooper's defence team brought up during the trial.

"Mistakes, yes. Intentional misconduct, no. Dishonesty, no." said Bazemore, adding it was very difficult to listen to accusations by the defence that police botched the investigation.

With files from CTV's David Ewasuk and  ABC's WTVD.