I agree with with Ron. Every crime commited on a cruiseship is a world wide sensation, but if a couple of people are murdered in any city in the US, no one outside of that area hears about it.
There are many ships out there carrying tousands of people on each ship. With so many people at sea at any given time, some altercations are bound to happen.
Carnival Liberty New Year's Eve 2007
Liberty of the Seas 5/2008+11/2009
Allure 1/16/ 2011
Vision OTS 2-14-2015
Freedom OTS 3/6/16