Arkansas prosecutors say they're seeking the death penalty for one of the men accused in the brutal killing of a 24-year-old mother and two of her three young children in 2017.

Pulaski County Chief Deputy Prosecutor John Johnson told a judge on Tuesday that prosecutors would seek the lethal injection for 26-year-old Michael Collins, making it the first death penalty request the county has pursued in a decade.

Collins and his brother, 22-year-old William Alexander, have been charged with capital murder and aggravated robbery in the stabbing deaths of Mariah Cunningham, five-year-old A'Layliah Fisher and four-year-old Elijah Fisher.

Arkansas prosecutors are seeking the death penalty for Michael Collins, 26 (left), who along with his brother, William Alexander (right), has been charged with capital murder and aggravated robbery

Cunningham's grandmother, Sheba, found her granddaughter and two great-grandchildren knifed to death in the family's Little Rock home on December 5, 2017, reported Arkansas Democrat Gazette.

Cunningham's other daughter, Cheyanne, who was eight at the time of the triple homicide, was not home that day.

Investigators found traces of bleach on the bodies and discovered a steak knife believed to have been used in the murders in the bathtub.

Collins and Alexander are accused of stabbing to death Mariah Cunningham, 24 (left), and two of her three children, five-year-old A'Layliah Fisher and four-year-old Elijah Fisher (right)

A relative said Collins had been living with Cunningham and her family, but the woman told him to move out on the same day she and her children were found dead

Mariah Cunningham is pictured above with her son Elijah, before their murders

Police have not released an official motive in the killings but described it as a 'domestic-related' situation.

Following Collins and Alexander's arrests last year, the victims' relative told KATV that Collins was living with Cunningham's family and was a friend of her boyfriend, who was in prison in 2017.

The family member said that Cunningham had told Collins he had to move out of her apartment on the same day she and her children were found dead.

The brothers have also been charged with capital murder and aggravated robbery in a fourth slaying, which was initially ruled a suicide.

Billie Thornton, 64, was found dead in his apartment in July 2017.