Coffee Break Training: Fire/Arson and Explosion Investigation Curriculum: The Bottom Line on Miranda Warnings [open pdf - 195KB]
"Everyone is probably familiar with the language contained in the Miranda Warnings from watching television crime shows and movies. However, many individuals may not be aware that the Miranda Warnings are required only in situations involving custodial interrogation (questioning). Custodial interrogation is generally defined as questioning initiated by law enforcement officers after a person has been taken into custody or otherwise deprived of his or her freedom of action in any significant way. No warnings are necessary unless the suspect is in custody, nor are any warnings needed until a law enforcement officer (i.e., police or fire investigator) initiates questioning."
Coffee Break Training - Fire Investigation Series No. FI-2013-17
United States Fire Administration: http://www.usfa.fema.gov/