Ed Moynan's body was found in a suitcase in Panama in the spring of 2013, in a park not far from the gated community where he lived with his wife, Louise Moynan. He was 68, and he had been reported missing in November 2012.
A Swiss man was arrested in connection to the case on Friday, according to Louise Moynan and her lawyer, Carlos Sanad.
"It's very difficult to me, going back to this," Louise Moynan told CBC News on Tuesday morning. "All I'm praying for is that whoever did this ... are [brought] to justice. That's all I'm hoping for, that justice is served.
"I don't think I have enough vocabulary, words to describe the frustration. It's been very very difficult," she said, adding that it's been hard to deal with a judicial system she doesn't understand.
The couple had moved to the beach town of Coronado after selling their Ottawa business, Centennial Glass. Louise Moynan returned to Ontario after her husband disappeared.
At the time, police in Panama said the couple's home was found ransacked. Moynan's broken glasses, wallet and watch were also found in the home.
Sanad told CBC News an investigation suggests there may have been others involved in the killing.