If someone is killed or injured in a crash a blood sample can be taken from against your will?

In many jurisdictions, if a person is involved in a crash that results in injury or death, law enforcement may have the authority to take a blood sample without consent, particularly if they suspect impairment or if the individual is incapacitated. This action is typically justified under laws related to public safety and the investigation of traffic incidents. However, the specific legal standards and procedures can vary by location, so it's important to understand the local laws governing such situations.