Octavio Grado, 28, is being held on suspicion of colliding with oncoming traffic on Sunday, May 3, 2015, in Phoenix, killing two and paralyzing a 4-year-old girl, according to court documents.(Photo: Maricopa County Sheriff's Office)Statistics released by the Arizona Governor's Office of Highway Safety showed that authorities made fewer DUI arrests in a targeted effort this past Cinco de Mayo weekend than they did last...