REPUBLIKA.CO.ID, DENPASAR -- The Bali Police used a lie detector, also known as a polygraph, while interrogating the suspects in the case of the murder of 8-year-old Angeline in Denpasar, Bali.
Chief of the Bali Police Inspector General Ronny Sompie said here on Monday that a lie detector was used to question Agus, who is suspected to have committed the murder, and Margriet Christina Megawe, Angeline's foster mother charged with child negligence.
Sent by the National Police Headquarters, the polygraph arrived in Bali on Sunday, June 14.
"A lie detector is a device used to find out whether a suspect is lying or speaking the truth," Sompie explained.
A polygraph or lie detector works by measuring and recording several physiological indices, such as blood pressure, pulse rate, respiration, and skin conductivity, while the subject is asked to answer a series of questions.
Deceptive answers will produce physiological responses that can be differentiated from those associated with non-deceptive answers.
Angeline was found buried in the backyard of her house on Wednesday, June 10, after she was reported missing on May 16.
The case has drawn a lot of concern from numerous quarters across the country, and the police have been urged to investigate it thoroughly.
Besides arresting Agus and Megawe, the police also arrested Ivone, one of Megawe's children.
Megawe and Ivone were arrested at a villa in Canggu in the district of Badung early on Sunday morning and were immediately sent to a detention cell, at 4:35 a.m.
According to Sompie, the police named Megawe as a suspect based on the results of developments in Angeline's case following the confession made by Agus, the suspect behind the child's murder, during his questioning as a witness in the case of child negligence.
Although Megawe was named as a suspect in a different case, Sompie noted that it was not impossible that investigations would later find it linked to Angeline's homicide case.