The Iowa Division of Criminal Investigation says a woman found dead in Walker, Iowa on Wednesday morning is the mother of the three children involved in an Amber Alert. Iowa authorities canceled an Amber Alert for 8-year-old Brooklyn Gaffney, 6-year-old Mia Gaffney and 8-month-old Nevaeh Hogan around 11:20 p.m. Wednesday. Waterloo police have confirmed the three children had been found and are safe. Authorities say the suspect, Shaun Michael Hogan, 36, is still at large and should be considered dangerous. Earlier, the four were believed to be traveling in a red 2001 Pontiac Grand Am with license plate number 832YPC.