Johnny Paul Penry

Johnny Paul Penry (born May 5, 1956) is a Texas prisoner serving three consecutive sentences of life imprisonment without parole for rape and murder. He was on death row between 1980 and 2008, and his case generated discussion about the appropriateness of the death penalty for offenders who are thought to be intellectually disabled. 
Penry's case went twice to the United States Supreme Court: "Penry v. Lynaugh" (1989) found that executing intellectually disabled persons is not cruel and unusual punishment; "Penry v. Johnson" (2001) found that the jury's instructions regarding mitigating factors were incomplete and that Penry should be re-sentenced. Prosecutors reached a plea agreement with him in 2008 under which he was sentenced to three consecutive life sentences.
Early life.
Penry sustained brain damage at birth related to complications from breech positioning. His mother suffered from paranoid schizophrenia. One of Penry's siblings said that their mother would threaten to cut off Penry's genitalia and had forced him to drink his own urine and eat his own feces. "We were all abused, but he was abused the worst," his sister said. Penry did not attend school past the first grade. 
Arrests.
In 1977, Penry was convicted of rape and sentenced to five years in prison; he was released from prison in the summer of 1979 after serving two years for that crime. Penry found work delivering appliances. In October 1979, he raped and killed a young woman by stabbing her with a pair of scissors. The victim, Pamela Moseley Carpenter, had received an appliance delivery from Penry a few weeks before the crime. Penry had been out of prison for three months at the time of the murder. Carpenter, 22 years old when she died, was the younger sister of National Football League kicker Mark Moseley.
On Oct 25, 1979, Penry broke into Carpenter's house and stabbed her with a pair of scissors she had been using to make a Halloween costume for her niece. He then beat and raped her before leaving her for dead. Carpenter eventually died from internal bleeding, but lived long enough to call a friend and provide a description of suspect as she was being transported to a hospital in an ambulance. Penry was arrested by police on the same day.
Penry was sentenced to death on April 9, 1980.
Appeals and U.S. Supreme Court rulings.
By 1989, Penry's appeals reached the U.S. Supreme Court. In "Penry v. Lynaugh", the court held that the execution of intellectually disabled offenders did not constitute cruel and unusual punishment, but it overturned Penry's death sentence, holding that Texas laws on jury instructions had not allowed jurors in his Penry's case to adequately consider intellectual disability as mitigating evidence during the punishment phase of his trial.
Penry was retried in 1990 and again sentenced to the death penalty. In 2001, Penry's 1990 conviction was appealed to the U.S. Supreme Court. In "Penry v. Johnson", the court ruled, by a 6-3 majority, that the judge presiding over the 1990 trial had given inadequate instructions to the jury in terms of how they should weigh the concerns about Penry's mental impairment when deciding his punishment.
Subsequent legal proceedings.
In 2002, Polk County district judge Elizabeth Coker removed his longtime defense attorney, John Wright, from his case. Coker ruled that Wright's continued work on the case might represent a conflict of interest if Penry were to advance an argument of ineffective legal counsel. The judge had previously declared Penry competent to stand trial, but she questioned whether he was able to comprehend an affidavit he signed that said he wanted Wright to continue to represent him. 
Coker appointed Stephen C. Taylor to replace Wright as Penry's defense attorney. Prosecutors had earlier consulted with Taylor about how to present arguments that Penry was competent to stand trial. Coker's ruling was criticized by legal ethics expert Stephen Gillers, who said, "This is imaginary law. This is not real-world law. This is Alice in Wonderland law." Wright later returned as Penry's attorney.
In October 2005, Penry's third death sentence was overturned by the Texas Court of Criminal Appeals on the grounds that the jury may not have adequately considered Penry's claims of mental impairment. In the summer of 2006, the U.S. Supreme Court refused to reinstate that sentence.
Wright said that Penry's IQ was between 50 and 60; an IQ of 70 is used as the threshold for intellectual impairment. Prosecutors remained convinced that Penry was not intellectually impaired, pointing to two television interview clips that had been shown at one of his trials. Prosecutor William Hon said that Penry spoke normally on one tape but "like Elmer Fudd" on the other. "It was the most contrived performance you've ever seen in your life," Hon said. He said that Penry was a sociopath and that he had only been sent to a home for the intellectually disabled because he had been such an uncontrollable child.
Plea agreement.
On February 15, 2008, Penry agreed to a plea bargain in which he was given three consecutive sentences of life without parole for Carpenter's murder and sexual assault. As part of the plea deal, Penry had to certify that he was not intellectually disabled. Prosecutors did not want to risk putting Penry through a fourth trial. The district attorney most familiar with the case had died in 2003, and if the fourth jury did not hand down a death sentence, Penry would have served enough time to be eligible for parole immediately under 1970s laws governing life sentences in Texas.
After the deal was reached, Carpenter's niece, Ellen May, said she was happy that Penry would remain in prison forever and she said the agreement proved that Penry had been lying about being intellectually disabled. Wright said that it was "galling" for prosecutors to require Penry to say that he was not intellectually disabled, but he characterized the stipulation as "a small price to pay" for eliminating the possibility of execution.