Why is Officer Coleman sent to Wolf Hollow in the novel, Wolf Hollow?

Officer Coleman is the point man for the Pennsylvania State Police who responds to Wolf Hollow and the disappearances of Betty and Toby. Coleman’s authority and levelheadedness allow him to get to much of the truth that had previously been unknown –such as Andy and Betty wanting to cause trouble for Toby. Coleman helps organize efforts to find both Betty and Toby, and later has the difficult duty of reporting news relating to Toby’s death.