A missing underscore in a subpoena led Canadian police to wrongly convict an innocent man, Brandon Klayme of Nova Scotia, for child sex offences. A 2018 investigation into online grooming of a 12-year-old Wisconsin girl identified the suspect's Kik messaging username as "fus__ro_dah" (with two underscores), but a subpoena sent to Kik mistakenly requested details for "fus_ro_dah" (one underscore), returning the wrong person's email address and setting off a chain of errors that ended with the wrong man behind bars.

Klayme was arrested in 2020 despite investigators finding no evidence linking him to the crime on his phones or laptops, convicted at trial in 2023, and sentenced in 2024 to 18 months in prison, which he served in full. Neither prosecutors nor his own defence team spotted the username discrepancy until his appeal was being prepared after his release. On Thursday the Nova Scotia Court of Appeal quashed his conviction, stating he was "factually innocent" and "should never have been charged, let alone convicted."