Madison Police raided the Rising Sun massage parlor at 117 W. Main St. Wednesday morning.
The officers executed a search warrant at the massage parlor near the Capitol building, according to the incident report. Detectives were searching for evidence in an alleged prostitution investigation.
Back in 2008 police investigated the sexual assault of a 5-year-old Madison girl on the city's east side, according to the incident report.
""Information gleaned in that case led to an ongoing investigation from which probable cause was developed for the execution of this morning's search warrant,"" Madison Police spokesperson Joel DeSpain said in a statement.
Usually prostitution investigations are get underway as a result of citizen complaints, DeSpain said.
Court documents have been sealed for three months and specifics of the case cannot be disclosed, according to the incident report.
At this time no arrests have been made in the current case.