A Manchester man will spend 16 years in prison for killing his girlfriend, 26-year-old Sophia Bonfiglio.Tyler Cook, 26, pleaded guilty to manslaughter after shooting Bonfiglio on New Year's Eve 2023.>> Download the free WMUR app to get updates on the go: Apple | Google Play <<Prosecutors said Cook had his finger on the trigger of a loaded gun when it went off, killing her.Cook will be eligible for parole in 2031.