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Warning: This story contains spoilers from season 2 of Cruel Summer.<\/strong><\/p>\n Cruel Summer<\/em> finally revealed who killed Luke during the season 2 finale<\/a> \u2014 taking several surprising swings in the process.<\/p>\n During the episode, which aired on Monday, July 31, Brent (Braeden De La Garza<\/strong>), confessed to Megan (Sadie Stanley<\/strong><\/a>) that he was responsible for Luke\u2019s death<\/a>. Through flashbacks, viewers witnessed how Brent picked Luke (Griffin Gluck<\/strong>) up at the dock before the siblings got into an argument about their mother\u2019s death \u2014 which was actually caused due to her alcoholism.<\/p>\n Brent, who didn\u2019t want to hear the truth, pushed Luke causing him hit his head against a railing and fall into the water. The eldest Chambers child told their father, Steve (Paul Adelstein<\/strong><\/a>), what happened and the crime was initially covered up.<\/p>\n Things took a turn, however, when Luke\u2019s body was discovered and Megan and Isabella (Lexi Underwood<\/strong><\/a>) became persons of interest. Isabella seemingly gave the police a redacted tape showing only Megan with a gun in the cabin with Luke the night he got killed. The plan to frame Megan didn\u2019t work out though<\/a> because Brent admitted to the crime.<\/p>\n In the aftermath, Megan attempted to make peace with Luke\u2019s passing while Isabella left without a trace. Cruel Summer delivered a shocking blow at the end of the episode when Megan found footage showing Luke still alive after his fall. He washed up at the shore \u2014 where Isabella drowned him.<\/a><\/p>\n