NEW YORK (AP) — UnitedHealthcare’s CEO has been shot and killed in what police say is a “brazen, targeted attack” outside a Manhattan hotel where the health insurer was holding its investor conference. The shooting rattled the city and set off a massive dragnet hours before the annual Rockefeller Center Christmas tree lighting. Police say 50-year-old Brian Thompson was shot around 6:45 a.m. Wednesday as he walked alone to the New York Hilton Midtown from a nearby hotel. New York City Police Commissioner Jessica Tisch says the shooter appeared to be “lying in wait for several minutes” before approaching Thompson from behind and opening fire. Police have not yet established a motive.