A person under the influence of something like bath salts would be a police call. EMS would supplement the CPD, not handle the call alone as was shown.
Kelly makes a rookie mistake when he removes the rod from the boy's arm. A trained fire Lieutenant would have not left hos phone behind, but even if he had, he would have realized the need to activate EMS. A better plan would have been to run back and either retrieve his phone or stop at an open business to do so.
Ridealongs require a liability waiver and usually a background check.