Nehwish Rana said in a written statement before the court Thursday that he hoped Billy J. Ingram would burn in Hell for killing his father last year.
Shortly after, Judge Kathryn Foster sentenced Ingram, 21, to a life sentence without parole.
Foster described Billy J. Ingram, who chose not to speak on his own behalf, as 'indifferent' to the impact his actions had on Rana's family.
'What frightens me is that nobody could really predict you would do this,' she said.
Ingram was found guilty in June of shooting and killing Nayyer Rana, 56, during a botched armed robbery of Waukesha's Petro Mart on May 29, 2012.
Ingram was picked up a day after the murder by Brookfield Police investigating reports of a residential burglary in the 200 block of Sheffield Drive. Found in his possession was Rana's cellphone, over $200 in cash, a .40 caliber shell casing and a black rubber glove matching the description of one found at the scene.
Mohney Rana, Nayyer's daughter, described her father in a statement to the court as a caring and hardworking man who did everything for his family.
'He was the best dad a daughter could ask for,' she said, crying. 'I miss his laugh, I miss his comforting way.'
She said that her father's death has been particularly traumatic for her mother, who was 18 when she married Nayyer.
She desribed her mother screaming in protest when she first saw Nayyer's body.
'No sentence that Billy Ingram could receive would ever make up for the pain that he caused my dad,' she said. 'I hope my father's death haunts you for the rest of your life.'
Nehwish had a victim's witness read his statement to the court. He lamented that Wisconsin did not have a death penalty.
'If killing my dad was not his intention, why did he shoot him three times?' she asked. 'Why shoot him twice and then the third shot that he knew would be enough?'
Assistant District Attorney Stephen Centinario represented the state in the case. He spoke of the chilling effect late-night murders have on surrounding businesses.
'Nothing good happens from 11 at night to 5 a.m.,' he said.
Defense Attorney Samuel Benedict argued that legislators had intended that a life sentence without parole be reserved for only the most 'aggravated offender.'
He conceded that Ingram's crime was egregious, but pointed out that Ingram was relatively young and his criminal history, which included a 2010 home burglary, was not extensive.
'The characteristics of young people are changeable,' Benedict said.
Ingram was also sentenced to 25 years in prison for armed robbery, five years in prison for possession of a firearm by a felony, and six months in prison for possession of marijuana. All three sentences will be served concurrent to the homicide sentence.
He will be eligible for parole on Sept. 18, 2071. He will be 80 years old.