Possible Clues:

• Dangerously uncontrollable type
• One might go off on a tangent, causing damage
• Unattached clergyman, reportedly an unpredictable type
• Scarily unpredictable type
• Unpredictable person at large with gun
• Unpredictable person liable to cause harm
• Dissolute priest, say – a cause of indiscriminate damage?
• Uncontrolled member of a group, who may cause damage
• Reckless person
• Reckless one