It is the least reported major crime in America but one that can affect victims for years.

This weekend it happened again -- a sexual assault.

Gun toting police officers scoured a neighborhood near 42nd and Ames Avenue Sunday morning searching for a sexual assault suspect.

Police dogs were called to help track him but the suspect got away.

As police investigate, the victim is rushed to the hospital...for medical assistance and hopefully a support system that will help the victim cope with what happened.

The statistics surrounding sexual assaults are grim.

Nationally, 30-66% of those crimes go unreported.

Eighty-five percent of the time the victims know their assailant.

"If they know that person they're a lot more fearful of what may happen...of people not believing them and they also may feel guilty too as to what may have happened," Emily Nguyen of the YWCA said. "They may feel like it's partly their fault and just don't feel comfortable and know the resources."

Nguyen is a victim's advocate with the YWCA.

"Regardless of what happened it is so important to make sure that they are medically okay and so we always encourage victims that we talk to after the fact that if they haven't accepted medical treatment, that they do seek medical treatment right away," Nguyen said.

Advocates like Nguyen will accompany victims during forensic examinations and interviews.

But sexual assault is a psychological crime as well.

Nguyen said victims need support systems from not only professionals but from family and friends.

"What's important to do is say I'm here for you, I'm worried about you I want to make sure that you're okay and I'm just here to listen and I'm here to support you and I do support you," Nguyen said.

Nguyen also said the emotional scars of sexual assault can last for years and so should the victim's support system.

"There are people out there that will support them and help them heal and thrive and move forward," she said.

Police are still looking for the suspect in Sunday morning's assault.