In this Sept. 11, 2009 photo photo, Phoenix Police Department Officer James Lawler, of the DUI Squad, draws blood from an alleged extreme DUI suspect as he works out of a mobile DUI processing van in Phoenix. The nation’s highest court ruled in 1966 that police could have blood tests forcibly done on a drunk driving suspect without a warrant, as long as the draw was based on a reasonable suspicion that a suspect was intoxicated, that it was done after an arrest and carried out in a medically approved manner. The practice of cops drawing blood, implemented first in 1995 in Arizona, has also raised concerns about safety and the credibility of the evidence. (AP Photo/Ross D. Franklin)