Kavanagh is one of three case managers in the homicide unit. While this is still being considered a missing person investigation, the fact it is being led by the homicide unit is a sobering and ominous indication of a reality that no one wants to say out loud.
It is Kavanagh's investigation in every way, though it likely came to him simply because it was his turn. He directs his detectives, he allocates resources, liaises with other police services, takes journalists' questions and works with the Crown's office to lay charges.
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He and his team are interviewing Millard, knowing he likely holds the key to Tim's whereabouts and the identities and locations of other suspects. They are preparing and executing search warrants for Millard's home and hopefully getting arrest warrants for other suspects.