BUFFALO, NY (WKBW) - Two jurors cried as the verdict was announced in the Luke Wright trial on Wednesday.
Wright, 32, was found guilty of ten counts including rape, sodomy, incest and assault.
Wright sexually abused and tortured his developmentally disabled sister, Laura Cummings.
Cummings, 23, was murdered by their mother in January, 2010.
Wright could spend the rest of his life behind bars for his crimes. His mother, Eva Cummings, 51, is serving a 52-years-to-life prison term.
The jury of six men and six women deliberated for about four hours after receiving instructions from Erie County Court Judge Michael D'Amico.
"I started to cry during the verdict," said prosecutor Kristen St. Mary. "It's a lot. And at the end is when you can let it out."
The jurors rarely expressed emotion during the six days of testimony as they listened to police detectives and relatives discuss the torture and abuse Cummings was forced to endure.
"They were unbelievable staying stoic throughout the trial," St. Mary said. "As were we. This is why we do this job. To speak for someone who can't speak now and really during her life was not able to speak. This was the first time that Laura got to tell her story."
An alternate juror, who was not part of deliberations, said he believed Wright to be guilty beyond a reasonable doubt.
"Seeing what this poor girl went through and the life that they unfortunately lived," said Anthony Farace. "It was definitely disturbing."
Defense attorney John Nuchereno said his client was unable to waive his right to remain silent, and therefore, the jury could not use Wright's statements to police against him.
Wright gave seven sworn statements to police in the days following his sister's death, in which he admitted to having sex with her and covering her head with a hood.
"[Police] said there were times that they couldn't take it anymore, they didn't want to listen to him anymore," said prosecutor Thomas Finnerty. "They were tired of listening to his disgusting, awful words. But they had to keep listening because he was their source of information. And the only way her story was going to be told is if they resisted their temptation to arrest him and let him keep talking."
The jury could have found Wright guilty, but not responsible due to mental disease or defect.
Instead, the jury found Wright criminally responsible.
He will be sentenced on May 23.