A month after two teens were beaten up and robbed by a dozen girls on the 4 train, one mother says she hopes a new video posted online of the attack will help police find the suspects.

The victim's mother says she told the police as soon as she was told video of the attack was posted on the website 'WorldStarHipHop.com.' She says she didn't view it because she finds it "heartbreaking" to watch her daughter get attacked.

Riders on the 4 train say the subway line is very dangerous and an increased police presence is needed.To watch an interview with the woman whose daughter was attacked on the subway, click on iO Extra on Channel 612.