The 37 Scientific Evidence of Digital Evidence Tampering on CCTV Footage at Olivier Café: The Jessica Kumala Wongso Case (2016), Carried Out by Muhammad Nuh Al-Azhar and Christopher Hariman Rianto, Who were Under the Leadership of the General Crime Director of the Jakarta Metropolitan Police, Krishna Murti, and the Chief of the Jakarta Metropolitan Police, Tito Karnavian.
EVIDENCE 8:
MUHAMMAD NUH AL-AZHAR PERFORMED DOWNSCALING ON CCTV 1 FOOTAGE FROM 15:46 To 18:30 LOCAL TIME, REDUCING THE FRAME DIMENSIONS TO 960x576 PIXELS AND THE FRAME RATE TO 10 FRAMES PER SECOND
According to point 27 in the interrogation report (BAP - Berita Acara Pemeriksaan) of Muhammad Nuh Al-Azhar, the dimensions should have been 1920x1080 pixels.
During this time interval, tracking Rangga's movement in making coffee was necessary, yet Muhammad Nuh Al-Azhar blurred it instead.
Analysis
The forensic impact of Muhammad Nuh Al-Azhar's downscaling of CCTV 1 footage from 15:46 to 18:30 local time is significant. By reducing the frame dimensions to 960 x 576 pixels and the frame rate from 25 to 10 frames per second, crucial details were obscured. According to point 27 in the interrogation report of Muhammad Nuh Al-Azhar, the dimensions should have remained at 1920 x1080 pixels. This intentional manipulation of the video's resolution and frame rate raises questions about the integrity of the evidence presented in court.
During this time interval, tracking Rangga's movement in making coffee was essential for understanding the sequence of events. The downscaling of the CCTV 1 footage, orchestrated by Muhammad Nuh Al-Azhar, severely impacts the ability to analyze whether the coffee and milk were not mixed (remained as two layers) or not in the cup before the alleged poisoning incident. During the crucial time interval, tracking Rangga's movements in preparing the coffee was essential for reconstructing the sequence of events leading up to the alleged crime. However, Muhammad Nuh Al-Azhar's actions blurred this crucial aspect instead of preserving it. By reducing the frame dimensions and frame rate, the clarity and accuracy of the footage were compromised, hindering forensic analysis and potentially distorting the portrayal of events. This manipulation could lead to misinterpretation and false conclusions during legal proceedings.
The decision to downscale the CCTV footage precisely during the time when Rangga was preparing the coffee and milk raises significant questions about the potential motives behind this manipulation. One possible explanation is that reducing the frame dimensions and frame rate during this critical period was intended to obscure or conceal any suspicious activity related to the introduction of any substance into the coffee.
By reducing the clarity and detail of the footage precisely during the preparation of the beverage, Muhammad Nuh Al-Azhar may have sought to create ambiguity or uncertainty regarding the events leading up to the alleged poisoning. Th
