The Los Angeles Police Department's Internet Crimes Against Children Task Force officials arrived at Simmons' Benedict Canyon home with a warrant.
Officer Mike Lopez told the Los Angeles Times, "The search is not related to Simmons and his family."
The Kiss star's representative revealed the LAPD asked the family not to discuss the investigation to avoid compromising it.
A statement reads, "They visited Mr. and Mrs. Simmons at their home to discuss a crime that may have occurred on their property last year while Mr. Simmons was away on tour with KISS. Neither Mr. Simmons nor any member of his family is a person of interest in the investigation and they are co-operating fully with the investigation."
Reports suggest police officers left the Simmons estate with computers and other equipment.