Authorities in Arkansas have arrested Andrew James McGann, a 28-year-old teacher candidate, in connection with the fatal stabbing of a married couple, Clinton and Cristen Brink, who were hiking with their two young daughters at Devil's Den State Park. The couple was killed while their children remained unharmed. McGann, who recently moved to the area and had been hired at a local school, faces two counts of capital murder and has admitted to the killings. He has been denied bond and could face the death penalty. The suspect had previously worked at schools in three different states. Separately, in northwest Tennessee, authorities are investigating a targeted quadruple homicide involving four dead individuals and an abandoned infant. They are searching for 28-year-old Austin Robert Drummond, wanted on multiple charges related to that case.