Hill v. Hamilton Wentworth Police is the seminal case on the tort of negligent investigation in Canada. The plaintiff was investigated by the police, arrested, tried, wrongfully convicted, and ultimately acquitted after spending more than 20 months in jail for a crime he did not commit. The Supreme Court of Canada found that the police are not immune from liability under the law of negligence and the tort of negligent investigation exists in Canada. Police officers owe a duty of care to suspects. Their conduct during an investigation should be measured against the standard of how a reasonable officer in like circumstances would have acted.