A federal search warrant reveals that Sunspot Solar Observatory was shut down as FBI agents conducted computer forensic searches for child pornography.

The source of child pornography was traced to an IP address used at the observatory and a source within the building observed a computer with “not good” images on it, the warrant states.

An investigation by the FBI revealed that a janitor is the main suspect in the search, however he has not been charged with a crime even though his name is on the warrant.

The warrant states the suspect would use the observatory Wifi and a personal laptop to download the child pornography.

A limited number of people have access to the observatory from dusk until dawn, which helped narrow their search.

The observatory in the mountains of southern New Mexico had been closed since Sept. 6 because of an undisclosed security concern, but reopened on Monday.