The Paperwork Trap: How a Systemic Glitch Led to the Detention of a Canadian Dentist

The ordeal of Dr. William Lizardo serves as a stark reminder that for high-skilled professionals navigating the U.S. immigration system, legal stability can be upended by a single administrative failure. As first reported by CBC Toronto, the 32-year-old dentist from Mississauga, Ontario, was taken into custody by agents from U.S. Immigration and Customs Enforcement (ICE) on Oct. 23 during a green card interview, despite having a history of professional contribution and familial ties to the United States.

Dr. Lizardo's path to residency followed a traditional trajectory for specialized talent. As detailed in court documents cited by CBC Toronto, he arrived in the U.S. in 2019 on a student visa to study at the University of Minnesota School of Dentistry. Following his graduation in 2023, he married an American citizen and became a father. In September 2023, his wife submitted a petition for an alien relative, which the government approved in January 2025. Even as his work authorization was revoked, Lizardo continued to serve the community, practicing in federally-designated shortage areas and volunteering at a low-cost clinic in Burnsville, Minnesota.

However, the transition from professional contribution to federal detention was triggered by a series of clerical lapses. CBC Toronto reports that in January, Lizardo's request for permanent residency was denied due to a missing certified document from Ontario. The situation escalated when subsequent hearing orders were sent to the wrong address. Despite the fact that Lizardo had filed changes of address with both the post office and U.S. Citizen and Immigration Services (USCIS)—and that USCIS had successfully communicated with him at those new addresses previously—he missed the hearings. This absence led to his arrest on Oct. 23 and his detention at the Sherburne County Jail.

U.S. District Judge Michael J. Davis described the facts of the case as "appalling," ruling that Lizardo's constitutional rights had been violated. While ICE argued that Lizardo should remain in custody while his green card case was adjudicated, Judge Davis found no reason to believe the dentist was a flight risk, noting that Lizardo had no prior arrests during his time in the U.S.

Legal counsel Hassan Ahmad told CBC Toronto that the entire ordeal was the result of a "paperwork error" that the government "literally made a federal case out of." Following a ruling by an immigration court on Oct. 28, which found Lizardo had provided sufficient evidence that he never received the hearing notices, a federal judge ordered his immediate release.

While Dr. Lizardo is now home, his legal journey is not over. He remains in a state of uncertainty, awaiting a final decision from USCIS regarding his green card application. According to Ahmad, the court order ensures that Lizardo cannot be detained by ICE again while awaiting this decision, though the lawyer noted that the initial removal proceedings were "tainted from the very beginning."