Secret Service Director Mark Sullivan will be called before a Senate committee on May 23 to talk about the investigation into the prostitution scandal in Colombia that rocked the U.S. agency last month.

According to the Washington Post, independent Sen. Joseph Lieberman, chairman of the Homeland Security and Government Affairs Committee, announced the upcoming hearing on Sunday while making an appearance on CNN's State of the Union.

This is really a heartbreaking incident, and really a dangerous incident, and we really have got to make sure it never does happen again, Lieberman said.

Lieberman also said Charles K. Edwards, acting inspector general of the Department of Homeland Security, who is conducting an independent investigation, will also be called to testify.

Twelve Secret Service agents were implicated in the prostitution scandal that escalated last month before President Barack Obama arrived in Cartagena for the Summit of the Americas meeting. Two supervisors were also implicated in the incident. Reports were that approximately 20 prostitutes were hired.

The scandal broke after an argument between an agent and a prostitute known as Dania Suarez at Hotel Caribe caught the attention of the owners and local police. They were arguing over payment for the prior night's services.

Suarez told the media that the men were very direct in asking for sex and that it was fair they lost their jobs. She called the agents idiots.

They are to be blamed for leaving their duties behind, Suarez, a 24-year-old single mother, told NBC News' Michelle Kosinski during an interview in Madrid.

I think it's fair they lost their jobs and can never have their badges again because they are not up to it, she said. They seem like completely stupid. Idiots. I don't know how Obama had them in his security force. What dumb men.

Suarez has since received offers to pose for Playboy and Hustler magazines. She also told the media that she has been approached by a publishing house about her story, and she has said she is interested because she has more to tell.