The police say that they have arrested one of the suspects who attacked a woman walking in Brooklyn last month. However, they hope the public can help them find the second one.

According to the police, a 32-year-old woman was sexually assaulted twice in an hour: The first attack occurred at 5 a.m. on August 31st, when the woman was walking in front of 187 Gates Avenue; the NYPD says that a suspect pushed her to the ground and sexually assaulted her. The suspect claimed he had a gun and would use it but did not display it.

Then the second attack occurred around 6 a.m., in front of 58 Irving Place, when a second suspect pushed her to the ground and sexually assaulted her. Again, police say the second suspect claimed to have a gun and said he would use it, but never displayed it.

The suspect in the first attack was caught—Nicholas Isaac, 17, was charged with robbery, criminal sex act, unlawful imprisonment, assault and criminal possession of a weapon. Isaac lives at 21 Clifton Place, just a few blocks from 187 Gates Avenue.

The second suspect is still at large. Police released a sketch of the suspect, as well as surveillance video (below).

While it was initially suspected the two attackers might have known each other, DNAinfo reports that the victim "begged a passerby for help shortly after the attack — and instead, he sexually assaulted her too, police sources revealed this week." Now police don't believe the attackers know each other; Captain Peter Fiorello, the 88th Precinct's commanding officer, said at a community board meeting, "It’s disgusting that this type of thing can happen."

Anyone with information in regards to this incident is asked to call Crime stoppers at 1-800-577-TIPS (8477). The public can also submit their tips by logging onto the Crime Stoppers website or by texting their tips to 274637 (CRIMES) then enter TIP577.