Police detectives wearing white gloves gather evidence from a suburban living room crime scene. A police officer takes down notes. Close up of officer examines the bottom of a flashlight and inscribing his initials on back for record keeping. Detective packs flashlight in a plastic bag. FBI laboratory forensic technician standing before a table with a flashlight that has been dismantled for examination. Close up of battery that he has found fingerprints on. Close up of FBI laboratory technician as he explains, "fingerprints provide a positive means of personal identification and form an indisputable link in the chain of evidence." Close up of a fingerprint on photo held by technician.
Police officers remove a curtain as a piece of evidence at a crime scene. Detective writing initials on lining of curtain gathered as evidence. FBI forensic technician from the hairs and fiber division standing in front of a robe suspended in laboratory to prepare to gather fibers. He notes, "this bathrobe, worn by the victim, is first searched for obvious hairs or fibers adhering to it." FBI technician scrapes robe to dislodge fibers. demonstrates how hairs and fiber are extracted from a cloth using a bloodied bathrobe. Forensic investigator scrapes the garment to dislodge unwanted particles. Closeup finger pointing to blood stains on bathrobe. Police officer scrapes up dried blood from carpet in crime scene. Policeman places powdered dried blood in pill box with tight-fitting lid and marks with pen. View of pill boxes containing blood samples as evidence from crime scene. At FBI serology laboratory, a forensic investigator points to robe with blood stains and notes that, "while a blood grouping alone is not sufficient to identify a person, it does lend weight to an identification, and it may well be sufficient to eliminate a suspect."
Police investigator collects glass fragments on floor as evidence at a crime scene. Close up evidence carton lid labeled by investigator, "glass from door." A second investigator writes his initials in lid of carton cup. FBI forensic investigator using a microscope in laboratory. Forensic investigator explains how examining glass fragments can be compared to other evidence. Close up of glass fragments in petri dish. Forensic investigator using an emissions spectrograph. Close up igniting emissions spectrograph. FBI scientist operating a mass spectrograph. inside the FBI laboratory. FBI nuclear reactor water pool. Forensic investigator reading results from a neutron activation analysis. A forensic investigator discusses how laboratory findings can aid criminal cases and the importance of handling physical evidence before sending to the FBI laboratory. Judge seen in a court room as a police investigator on the stand testifies that the crime scene had been "properly protected by our uniformed men." Policeman standing guard by the door while policemen gather evidence at crime scene. Sketch of the crime scene. Detective taking photograph of glass fragments at crime scene. Footprint photographed. Investigator holds up a plaster cast at crime scene. Policeman collects glass fragments. Investigator carves his initials on metal striker plate of doorknob. Pill boxes with dried blood samples. Policemen packing crime scene evidence. Police investigator in court on witness stand notes that all evidence "was maintained in my custody." Lawyer in court saying "no further questions." Closing credit "presented by The Federal Bureau of Investigation."
FBI agent trainees listen to professor giving lecture at the FBI Academy. Blackboard reads “Jurisdiction of the FBI 1. Statutes 2. Executive Orders 3. Constitutional Provisions”. External view of the U.S. Department of Justice building in Washington DC (950 Pennsylvania Ave NW, Washington, DC 20535), original site of FBI headquarters. Sign reads “FBI Laboratory”. Sign reads, “Document Section 7613”. An FBI laboratory technician uses tweezers to reconstruct a piece of burned paper on a table. FBI Academy students observe FBI technician as he presses burned paper pieces between glass plates. FBI Laboratory technician mounting glass plate containing paper fragments on camera stand and taking photograph of it using a large format bellows still camera equipped with infrared film. View of upside document as seen through camera. Close up hands developing photograph that reveals message, "we will hit the bank at Middle Town."
Sign saying “Spectrography 7417”. A lab technician extracts paint chip samples from a sledgehammer. Lab technician examines paint chip samples under a microscope. Paint chips as seen through a microscope. A cartridge is inserted into an electron microscope. Lab technician demonstrates the electron microscope to two FBI trainees. Cartridge powder residue as seen via electron microscope. A gun forensic expert shoots revolver at a container filled with cotton batting and then retrieves bullet from the cotton. An FBI lab technician demonstrates his work to FBI trainees as he examines shoes from a crime scene.
FBI Academy student trainees enter the Identification Division building for the Federal Bureau of Investigation. Plaque on building reads “Identification Division”. Female employee stamps a fingerprint card and staples receipt to it as FBI Academy trainees watch. FBI employees manually match incoming finger print cards again fingerprints from wanted files. An employee using a loupe magnifier to examine fingerprint. View of a fingerprint through loupe magnifying glass. Close up of fingerprint. Narrator notes that "no machine has yet been devised to classify fingerprints." Tour of fingerprint library as employees sort fingerprint files. FBI trainees pull out fingerprint cards from file cabinet and examine them. FBI Academy agents submit fingerprint cards to an operator running one of many large duplicating machines. Documents exiting duplicating machine handed to secretary. Female employee inserts documents into an envelope, places envelope in neatly arranged sets of envelopes to be mailed later. FBI agents walk through secretary pool at FBI Identification Division.
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