Fingerprints can be an important part of an investigation; however, a private investigator does not have to be at the crime scene to get the prints. PIs don't need to be a crime scene investigator or latent print processor to get the prints either. If the evidence is collected and documented properly, a PI can get the latent print processed on a off-site laboratory.
Latent print is a transferred impression of friction ridge detail that is not readily visible to the naked eye. They can be made sufficiently visible by a wide array of processes, procedures and equipment.
Latent print could be used in various investigations, including but not limited to various criminal investigations and fraud investigations.