federal judge phoenix hear arguments week resume executions arizona 2014 lethal injection take nearly two hours raise question state death chamber protocols chemicals use kill inmates case late challenge drug use many state execute prisoners may wind put issue back review u.s. supreme court arizona last year change lethal injection procedures follow trouble 2014 execution joseph wood lawyers seven arizona death row inmates contend new guidelines drug violate u.s. constitutional protections cruel unusual punishment one issue hear set wednesday u.s. district court sedative midazolam valium-like drug critics contend achieve level unconsciousness require surgery therefore unsuitable executions drug use wood execution along narcotic hydromorphone see gasp air nearly two-hour procedure receive 15 round drug injections lethal injections suppose result death matter minutes new protocols arizona list one mix use midazolam along drug cause paralysis another stop heart similar combination use oklahoma trouble execution inmate see twist death chamber gurney state say court paper file late monday intend revise protocols remove midazolam option pledge use even become available three options lethal injection mix use drug new protocols lawyers inmates contend source drug purity cloak secrecy since european makers u.s. pharmaceutical company pfizer inc halt sales drug use executions prison systems recent years result state turn lightly regulate compound pharmacies mix chemicals state obtain lethal injection drug since keep name suppliers confidential lawyers want put future executions hold court review protocols officials arizona fight tooth nail protect secrecy along use experimental drug combination serve increase risk problematic executions say dale baich attorney inmates state contend protocols correct previous problems permit implement capital punishment victims state governments right interest include important interest timely enforcement sentence state interest enforce laws david weinzweig argue behalf arizona hear year arizona execution procedures face review u.s. court