Grandmother shoots and kills two young grandsons and self

47-year-old Debra Denison, of Preston, Connecticut, picked up her grandsons, 2-year-old Alton Perry and 6-year-old Ashton Perry, from daycare and was supposed to take them home for a birthday celebration for Alton.  Instead, she shot and killed both boys before turning the gun on herself.  From an article:

Family members said Denison had bipolar disorder and a history of mental health problems.
Denison was armed with a gun when she left her home Tuesday afternoon and had permission to pick up the boys from daycare.
The bodies were found at about 9:30 p.m. Tuesday, about two hours after state police issued a statewide Amber Alert for Denison and the boys.