. >> pain and suffering is what the family of condemned prisoner dennis mcguire claimed he endured during his execution last month. mcguire was convicted in 1994, for the rape and murder of a pregnant newlywed. the system had run out of lethal drugs. the sedative medazalam and the drug hydromorphone. drugs that no state had ever used before. in an exclusive interview with "america tonight," mcguire's son says he feared what might happen with ohio's new lethal cocktail. >> he had a feeling that something was going to go wrong. the doctors had told him something was going to happen. he had a feeling, he just had a gut feeling that something was going to go wrong during the execution. >> that gut feeling became a dshed opportunity out t -- turned out to be a valued prem -- a valid premonition. >> we expected him to go to sleep, that's what we expected. >> i've seen about 18 and this differed drastically. >> he had never seen an execution anything like it. >> this one was different because after three to four minutes dennis mcguire began gasping for breath, his stomach deeply. he was making a

. >> pain and suffering is what the family of condemned prisoner dennis mcguire claimed he endured during his execution last month. mcguire was convicted in 1994, for the rape and murder of a pregnant newlywed. the system had run out of lethal drugs. the sedative medazalam and the drug hydromorphone. drugs that no state had ever used before. in an exclusive interview with "america tonight," mcguire's son says he feared what might happen with ohio's new lethal cocktail. >> he had a feeling that something was going to go wrong. the doctors had told him something was going to happen. he had a feeling, he just had a gut feeling that something was going to go wrong during the execution. >> that gut feeling became a dshed opportunity out t-- turned prem -- a valid premonition. >> we expected him to go to sleep, that's what we expected. >> i've seen about 18 and this differed drastically. >> he had never seen an execution anything like it. >> this one was different because after three to four minutes dennis mcguire began gasping for breath, his stomach and chest were compressing deeply. he was m

. >> this one was different because after three to four minutes dennis mcguire began gasping for breath, he was making a snorting sound almost a choking sound at times. i didn't notice it at first but his left hand which had been waving at his kids had about clenching into a fist. >> i noticed my watch, it was about 10:31, 10:32 a.m. i had difficulty seeing the exact time because i was crying at the time. >> mcguire's son read from an affidavit about exactly what he saw in a death chamber. >> he then made a noise that sounded like he was fighting for air and grunting at the same time. it was extremely loud. while this was happening, the war deden and the guy in the whe hitter had horrified looks on their faces, it appeared that they were shocked with the way it was happening. >> one of his lawyers had asked him to put on a big show but he had refused. a claim that ohio officials could not substantiate. now mcguire's family is filing a lawsuit to stop ohio from using the drug combination that killed him arguing that it amounts to cruel and unusual punishment. in when you strap somebody t

tell us about your relationship with that convicted murderer, dennis mcguire, what were his crimes? > i am a chaplain for the catholic inmates on death row. and i celebrate mass each week with them. and upon discovering that dennis was catholic, it was my responsibility and duty to meet him and to offer him whatever spiritual guidance i could prior to his execution. >> and you were there for that execution to deliver last rights. take us inside that room. what were those 26 minutes like? >> i've described it as ghastly in the past and that's the simplest and yet most profound wordy can use to describe it. in the first four minutes, those assigned to the task of sedating him put i.v.s in first one arm then the other. i couldn't tell honestly whether they had missed the vein in the one arm or not, but you could certainly see blood trickling from the arm. and in a progressive series of events from the first insertion of a needle to that began at 10:27 in the morning to 10:33, i was counseling his son and daughter and daughter-in-law. and you could hear gagging in the background and i th