A teen girl pleaded guilty Tuesday for her role in last year’s fatal beating of a disabled man in Northwest, while the other teen girls charged in the case will head to trial next month.  

The 15-year-old girl pleaded guilty to assault with a dangerous weapon in the October slaying of Reginald Brown, 64, who police said was missing multiple fingers on both of his hands after the alleyway attack along Georgia Avenue Northwest.

Prosecutors said the lethal weapon she used was her foot, according to a Washington Post report on the hearing involving the juvenile suspects.

The girl who pleaded guilty will remain at the juvenile detention facility until her sentencing next month.

The remaining four girls, who were between the ages of 12 and 15 during the attack, will go to trial in September. They are also being held at the juvenile facility.

The girls are accused of stomping on the man, whipping him with his own belt and celebrating the beatdown on a cell phone video taken by one of the young suspects.

In a police-recorded interview played in court, a 13-year-old girl charged in the case told Metropolitan Police Detective Harry Singleton that the group of girls first noticed a strange man roughing up Brown over money the victim allegedly owed.

One of the suspects asked the man “Do you need help? Can we fight him?” before the man told them to keep beating on Brown, according to the video.

The girl told Det. Singleton that the unknown man threatened to shoot the girls if they stopped pummeling the victim.

But Det. Singleton said the man, who hasn’t been identified or arrested in the case, was not seen with a gun in the video.

“These aren’t girls. These are animals and they should be locked up for the maximum amount of time,” Nasia Israel, Brown’s sister, told the Post.

The girls face the possibility of being jailed at the juvenile facility until they turn 21, the longest sentence they can face under District law.

• Matt Delaney can be reached at mdelaney@washingtontimes.com.