Who Killed Garrett Phillips Documentary Trailer - HBObr From two-time Academy Award-nominee and Emmy-winner Liz Garbus (HBO’s A Dangerous Son and Nothing Left Unsaid: Gloria Vanderbilt & Anderson Cooper), Who Killed Garrett Phillips?, examines the 2011 murder of 12-year-old Garrett Phillips and the subsequent trial of Clarkson University soccer coach Oral “Nick” Hillary.