investigation, can be used. The JAGMAN investigation should  not  interfere  with  the  completion  of  the  NCIS investigation;  therefore,  it  is  advisable  that  the  IO  wait until  NCIS  completes  its  investigation  before  obtaining a copy for use of the statements gathered by NCIS. Aircraft   mishap   investigative   report.   Aircraft accidents are investigated by one or more investigative bodies   under   existing   instructions   and   legal requirements. For  the  sole  purpose  of  safety  and accident prevention, the Chief of Naval Operations (CNO)  issues  special  instructions  for  the  conduct, analysis,  and  review  of  investigations  of  aircraft mishaps, These investigations are known as Aircraft Mishap  Investigation  Reports  (AMIRs).  Because  these investigations are directed toward safety problems, confidentiality is essential in order to allow personnel to be   honest   when   giving   statements.   Therefore,   a statement obtained in an AMIR is not available to the IO from any official source.    IOs from both the aircraft safety investigation and the JAGMAN investigation, however, should have equal access to all real evidence and  have  separate  opportunities  to  question  and  obtain statements  from  all  witnesses. Other mishap investigation reports. For the reasons specified  previously,  these  mishap  investigation  reports cannot be included in JAGMAN investigations. Inspector  General  reports.  These  reports  cannot  be included  in  JAGMAN  investigations. Polygraph   examinations.   Neither   polygraph reports  nor  their  results  should  be  included  in  the JAGMAN  investigative  report;  however,  if  essential  for a complete understanding of the incident, the location of the polygraph report should be cross-referenced in the report. Medical  quality  assurance  investigations.  A  naval hospital  will  conduct  its  own  investigation  (much  the same as the AMIR). Confidentiality is essential here also.  Therefore,  statements  obtained  in  a  medical quality assurance investigation cannot be used in a JAGMAN  investigation. Photographs,  records,  operating  logs,  pertinent directives,  watchlists,  and  pieces  of  damaged  equipment are  examples  of  evidence  that  the  10  may  have  to identify,  accumulate,  and  evaluate.  To  the  extent consistent with mission requirements, the CA will make sure all evidence is properly preserved and safeguarded until the investigation is complete and all relevant actions have been taken. Photographs and videotapes that have sufficient clarity to depict actual conditions are invaluable as evidence. Although, in some instances, color photos present the best pictorial description, they are more difficult to reproduce and normally require more time to develop; therefore, it maybe more prudent to use black and white film. Polaroid prints offer instant review to make  sure  the  desired  picture  is  obtained,  but  are somewhat   difficult   to   reproduce   or   enlarge. Photographs and videos should be taken from two or more angles, using a scale or ruler to show dimensions. The investigative report should include the negative plus complete technical details relating to the camera used. In  cases  of  personal  injury  or  death,  photographs  and videos that portray the results of bodily injury should be included only if they contribute to the usefulness of the investigation. Lurid or morbid photographs and videos that serve no useful purpose should not be taken. Sketches  instead  of  or  in  conjunction  with photographs  or  videos  provide  valuable  additional information. Insignificant items can be omitted in sketching, providing  a more uncluttered view of the scene. Where  dimensions  are  critical  but  may  be distorted by camera perspective, accurate sketches can be  more  valuable.  Sketches  should  be  drawn  to  scale, preferably on graph paper. They can also be used as a layout  to  orient  numerous  photos  and  measurements. Carefully handle pieces or parts of equipment and material to make sure this physical evidence is not destroyed. If attaching real evidence to the report is inappropriate, preserve it in a safe place under proper chain  of  custody-reflecting  its  location  in  the  report  of investigation.  Tag  each  item  with  a  full  description  of its relationship to the accident. If it is to be sent to a laboratory   for   analysis,   package   it   with   care. Accompany the item(s) with a photo or sketch showing the “as found” location and condition. Make  verbatim  copies  of  relevant  operating  logs, records, directives, memos, medical reports, police or shore patrol reports, motor vehicle accident reports, and other  similar  documents. To   assure   exactness, reproduce by mechanical or photographic means if at all possible. Check copies for clarity and legibility and examine closely for obvious erasures and markovers that might not show up when reproduced. If the IO observes an item and gains relevant sense impressions  (noise,  texture,  smells,  or  any  other impression  not  adequately  portrayed  by  photograph, sketch, or map), those impressions should be recorded and included as an enclosure to the report. 13-7