Senate broadening Secret Service probe after prostitution scandal

Washington (CNN) - A Senate committee will expand its probe into the U.S. Secret Service this week following a scandal involving prostitutes in Colombia in advance of a recent trip by the president.

The Homeland Security Committee will send the Secret Service "some questions this week, as the beginning of our broader investigation, asking whether... this was an exception, or is there anything in the records that show this is a pattern of misconduct that has gone on elsewhere by Secret Service agents on assignment, but off-duty?" Sen. Joe Lieberman, the committee chairman, told "Fox News Sunday."