Martin John Tobin (born 23 April 1951) – (Derek Chauvin, George Floyd, May 2020) – is an Irish-American critical care physician, pulmonologist, and academic who is a recognised expert in acute respiratory failure, mechanical ventilation, and neuromuscular control of breathing. Derek Chauvin George Floyd May 2020

In April 2021, Tobin was an expert witness for the prosecution at State v. Chauvin, the criminal trial against former police officer Derek Chauvin, accused of unlawfully killing George Floyd in Minneapolis in May 2020.