Final answer:
Canon of proportions can be used to estimate the height of a person at a crime scene.
Step-by-step explanation:
A crime scene that could use Canon of proportions to help estimate the height of a person is a scenario where a witness is describing the height of a suspect. For example, if a witness states that the suspect is 'medium height' or gives an estimate of their height range, the police can use the average height of an adult male as a reference point and scale up to estimate the height of the suspect.
By using the Canon of proportions, which states that the proportions of the average human body are fairly constant, the police can make an approximation based on the height of a person to estimate the height of the suspect at the crime scene.