@suspiciousauce He’s incorrect. The only way he would not be obligated to testify is if he was decertified (which hasn’t happened yet and only the POST commission can do so). While the commonwealth may choose not to call him(damned if you do/damned if you don't) the defense still can.
@DoctorTurtleboy Everything aside. Imagine you are pulling up to your family member’s house and you realize there’s a body on the lawn. Who isn’t going to bang that door down to make sure everyone in the house is ok?? How could she tell everyone “I knew they were ok”.. HOW