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Jessica’s digital forensic expert suspects footage modification
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CCTV footage shows Jessica scratching her hand continuously when a number of people help Wayan Mirna Salihin, who became unconscious after drinking a Vietnamese coffee at Olivier café on Jan. 6. (thejakartapost.com/Callistasia Anggun Wijaya)
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igital forensic expert Rismon Sianipar from Mataram University in testifying for Jessica Kumala Wongso has said CCTV footage from Olivier Café that had been enlarged by the prosecutors’ expert Mohammad Nuh has been unfairly modified.
Nuh presented the enlarged video before judges on Aug. 10 to show that Jessica scratched her hand and thigh continuously when Juwita Boon, alias Hani, and Olivier employees were trying to help Mirna on Jan. 6.
By analyzing the CCTV footage which was recorded by private television stations such as Kompas TV, INews, TV One and Berita Satu, Rismon has shown judges the irregularities in the enlarged video.
“We feel that the video has been edited or modified. In the forensic digital field, video editing can be conducted by brightening the pixel intensity to create a movement effect,” Rismon told judges.
Rismon says other forms of editing consists changing the frame speed and object texture. Adding that, the effects of modification can be seen by the inconsistency and disproportion of Jessica’s fingers.
“In the frame that showed Jessica scratching her thigh, all of Jessica’s fingers seem to be of the same length, which indicates editing. Jessica’s fingers seem ghostly,” Rismon said.
In the beginning of the trial, prosecutors refused Rismon’s request to directly analyze the enlarged video in court. Prosecutors said to analyze Nuh’s work, Rismon’s devices need to be standardized and certified. Judges granted the prosecutors’ rejections by saying that Rismon could analyze Nuh’s work when Nuh reappeared in court. (bbn)
