clearly officials at the moment are leaning away from the terrorism connection. what they say they have is a man in custody who was originally from afghanistan, but an australian citizen. a man with mental health issues. a man with drug use issues. reportedly missed a medical appointment earlier in the day. something triggered his decision to drive into the middle of a crowd of holiday shoppers in the middle of rush hour. an attack while it may not have been terrorism, was certainly terrifying. listen here. >> this is horrific. it's evil. we're not defined by these sorts of incidents. i'm confident we will go about our business and celebrate christmas. >> 19 injured, four of them still in critical condition. the youngest of the victims, a 4-year-old boy. the eldest an 80-year-old. it's just about 7:40 a.m. friday morning in melbourne, australia. as we understand it, trace,