What should a peace officer do if they have probable cause for criminal vehicular homicide?

A peace officer should obtain a warrant for a blood test if they have probable cause for criminal vehicular homicide. This approach is grounded in ensuring that evidence is collected legally and properly, as blood tests provide crucial evidence about a driver's impairment due to alcohol or drugs at the time of the incident.

In scenarios involving criminal vehicular homicide, it is vital to adhere to established legal protocols to ensure that any evidence gathered is admissible in court. When probable cause exists, the officer does not rely solely on consent for testing; rather, obtaining a warrant adds an additional layer of legal authority and protection for the investigation. This ensures that the testing process respects the constitutional rights of the driver, while still allowing law enforcement to collect the necessary evidence to pursue charges.

The other options, such as taking a chemical test only with consent or limiting chemical tests, do not align with the requirements for handling serious vehicular offenses where possible evidence could be time-sensitive, thereby potentially compromising the investigation. Additionally, abdicating responsibility to the driver's attorney is not a viable course of action for law enforcement in the context of gathering critical evidence related to a crime.