Capponi was the co-facilitator of the "From Surviving To Advising" initiative undertaken by the Centre for Addiction and Mental Health (CAMH).

[5] Her last two books, Last Stop Sunnyside (2006) and The Corpse Will Keep (2008) are mysteries featuring a woman detective in Toronto's Parkdale neighborhood, where Capponi lived.

[2] Capponi moved to Toronto at 18, to escape her abusive family home,[2][7] and had several psychiatric hospitalizations there.

[5][3] Her sister Diana Capponi also moved to Toronto, and did similar work, with fellow survivors of abuse and addiction, before her death in 2014.

[8] Pat Capponi was diagnosed with lung cancer in 2019, and died with medical assistance at age 70 years, on April 6, 2020, in a Toronto hospital.