An Ohio man has been sentenced to 27 years in prison after impregnating 14-year-old twins and their 12-year-old sister while he was living in their home with them, PEOPLE confirms.

Describing the impact on the victims, assistant prosecutor Jennifer McLaughlin, said in court, “These girls will suffer the rest of their lives because of this.”

Here are four things to know about this disturbing case.

1. The Rapist Knew the Victims’ Mother

Last November, Arnold Perry, 34, pleaded guilty to two counts of first-degree felony rape and a third-degree felony count of sexual battery, Mahoning County Common Pleas Court records show.

Perry was friends with the victims’ mother, who let him stay with her and her family at their Youngstown home when he had nowhere to live, assistant prosecutor McLaughlin told the judge, per the Associated Press.

After being welcomed into the home, Perry betrayed the family’s trust by raping the three victims in attacks that took place between May 2015 and November 2016, according to the indictment.

2. Two of the Victims Gave Birth and One Terminated Her Pregnancy

One of the twins had an abortion after her pregnancy was discovered.

But her twin and their younger sister had to give birth because their pregnancies were too far along when they were discovered, McLaughlin told the judge, according to The Youngstown Vindicator.

“These girls will suffer the rest of their lives because of this,” McLaughlin said in court.

The girls’ mother says she has been left to raise the babies with no help from Perry’s family, CBS News reports.

3. Perry’s Attorney Claims He Has Brain Damage

Perry’s own attorney, Mark Levelle, did not dispute his client’s actions, acknowledging that the rapes did occur.

While he admitted that Perry’s case is the “most heinous” he has ever handled, Lavelle asked the court for a lighter prison sentence of 15 to 16 years because his client had suffered a brain injury as a child “that prevents him from having feelings about his actions,” CBS News reports.

Perry had additional sex crimes as a juvenile, Lavelle acknowledged, although he did not specify the nature of the offenses or when they occured.