If Aaron called it in, or shared intel with someone else to set it in motion, I think he's deflecting in order to preserve a possible relationship with either April or Kayla by drawing attention to how many people they have alienated online and in person. He claims to hate Rekeita but says he begged Kayla and April to get out of the house. He hinted that he is in love with Kayla and has bonded with her over Rekeita's alcoholism. So he could simply be hoping one or both of them are reachable after they get out and can get clean, and he's unsure if they would hold this against him. Alternatively, he finds Rekeita unstable and doesn't want to be even FURTHER on his bad side once he gets out.
I really hope the call and the black eye are from the adults in the situation and not the children hauling off and reaching a breaking point.