A stabbing suspect locked up on Rikers Island died in his cell early Sunday morning — marking the seventh death at the notorious jail complex this year and the 26th in New York City jails since Mayor Eric Adams took office. A correction officer patrolling housing unit 5A at the George R. Vierno Center on Rikers Island found Curtis Davis, 44, lifeless on the floor of his cell about 5:10 a.m. and reported a medical emergency, according to Correction Department records. Jail staff started chest compressions on Davis about 5 minutes later and EMS medics showed up at about 5:45 a.m. to try to reviv...