> technique should only be used for major felonies
Doesn’t the crime they were pursuing, dealing heroin in connection with an overdose, rise to that level? (No comment on the merits of the law. Just the facts of the investigation.)
The article says the police didn't describe the man as a suspect in the warrant application. By this logic, the police could investigate any acquaintance of someone even peripherally involved in a crime (which is a huge chunk of the population.)