RedactedNarrative: Operator of Vessel 1 observed oncoming boat off port side traveling on a head on course, took evasive action turning starboard, other vessel did not see him till last second, other boat turned into his port side  Other boat operators were ejected, witness boat responded immediately.  Other boat operator and passenger re-entered their boat claiming no injuries, admitted guilt and agreed to follow me to nearest pier.  911 called Marathon Co.  Other boat left scene of accident..
NameOfBodyOfWater: Half Moon Lake
NearestCityTown: Mosinee