The prime suspect in the horrific Brooklyn baby shooting earlier this month that left 7-month-old Kaori Patterson-Moore dead claimed to police that the girl's father opened fire on him first, causing him to retaliate. Chief of Detectives Joseph Kenny said at an April 21 press briefing that Amuri Greene, who was arrested hours after the horrific April 1 stray-bullet shooting, told detectives that he had intended to gun down Jamari Patterson, alle…