Anjelita Rasa admitted that she shot 65-year-old William Aki, the man she said she used for a place to stay, a car to drive and money to buy drugs, in Aki’s Whitmore Village home in June 2015. But in a deal with city prosecutors, Rasa, 28, pleaded guilty to robbery.

State Circuit Judge Paul B.K. Wong sentenced Rasa to the maximum 20-year prison term Monday for first-degree robbery. He also told Rasa she will have to serve at least six years and eight months of her sentence behind bars because she has prior felony convictions. The Hawaii Paroling Authority will decide how much more of her 20-year sentence Rasa will have to serve before she is eligible for parole.

Rasa chose not to make a statement at sentencing.

Her plea deal required her to testify in the murder trial of Shaun Branco-Taguchi and his cousin Shane Rodrigues. Rasa told a state jury in September that after she shot Aki in the chest, it was Branco-Taguchi, her boyfriend, who shot him in the back of the head. A Honolulu medical examiner testified that either shot could have killed Aki.

The state also tried to convince the jury that Branco-­Taguchi got the murder weapon, a .22-caliber rifle, from Rodrigues and that both men were responsible for setting Aki’s car on fire.

The jury found Branco-­Taguchi guilty of arson and illegally possessing a firearm but not guilty of murder. The jury found Rodrigues not guilty of being an accomplice to murder and of illegally possessing a firearm and ammunition.

The jury didn’t have to decide whether Rodrigues committed arson. Wong dismissed the charge because neither Rasa nor Rodrigues’ girlfriend, Jessica Samson, implicated him.

Samson was charged with felony arson but pleaded guilty to a misdemeanor charge in a deal for her testimony against Branco-­Taguchi and Rodrigues.

Prosecutors told Wong they were going to take Samson to trial for felony arson because she violated her plea agreement, but later changed their minds about taking her to trial. She is set to be sentenced next month.