Other British Columbians who were in central London on Saturday say they're relieved that they didn't end up among the seven killed or the 48 injured when a van drove into a crowd of people on London Bridge and knife-wielding terrorists got out.
She "lived her belief", the statement said, by working for a homeless shelter before getting engaged and moving to Europe.
"We grieve the loss of our lovely, loving daughter and sister", Audet said.
She has been described as a woman who "believed strongly that every person was to be valued and respected". She had worked successfully in the extremely tough environment of a Calgary shelter where the residents are permitted to be intoxicated when entering. Her family says Archibald had moved to Britain to be closer to her fiancé.
The Archibald family asked that people honor her memory by making the community a better place.
In a statement, the Archibald family urged mourners to volunteer their time or donate to a charitable organization in her honour.
Breaking down in tears, Melissa told Sky News: "This morning we received news from police that my brother's bank card was found on one of the bodies from Saturday night's brutal attack but they are unable to formally identify him until the coroner's report begins tomorrow".
On Sunday, the Canadian government released a statement written by Ms. Archibald's family.
According to CNN affiliate Channel Seven, in a video on Instagram, the man was seen nursing a stab wound saying it was his last night in London before he was due to fly back to Australia the next day.More news: WhatsApp closer to introducing 'Recall' message feature
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Archibald had a great deal of empathy for people in tough situations, said Peter Choate, an assistant professor of social work at Mount Royal University, where she studied.
"She exemplified what matters to us in social work, and that's the capacity to see the challenging circumstances that someone finds themselves in and be prepared to work with them to cope as best they can with life's circumstances, " he said.
"I'm devastated by this", he said, "She didn't deserve that".
Premier Rachel Notley said Albertans have been shocked and deeply saddened by the attack.
He recalled Archibald as a quiet woman who grew in confidence as she completed her degree in social work.
"As her family and province mourn, we must never forget who we are - and the diversity that makes us strong". "They will not conquer the hearts and minds of the British people".
"The more good there is in the world, the more good there is for others to receive", said May, whose family still lives in London.
The Canadian High Commissioner announced that Prime Minister Justin Trudeau has been in touch with Archibald's family.
A uniformed British Transport Police officer was one of the first on the scene after responding to calls for help from the public. "We do meet them where they're at". The flag outside city hall in Castlegar stood at half-mast.