Need for Increased Security at Depositions

An attorney in the delta was recently shot and killed in a deposition.  Ellis Pittman was a colleague who I had litigated a case against in the past.  As a result, people are starting to question if there should be increased security at depositions?  I am aware of at least one case in the northeast where a law firm was sued for injuries to a party as a result negligent security in a deposition.  This is something that needs to be looked into and would be most likely outside of normal malpractice insurance.  I think business liability coverage would cover these type issues.