Christopher Hariman Rianto played a crucial role as a digital forensic expert in the controversial case of Jessica Kumala Wongso. Along with his colleague, Muhammad Nuh Al-Azhar, Rianto was implicated in manipulating the CCTV footage from Café Olivier, which was central to the prosecution's case. Their actions involved downscaling the video resolution from 1080p to 960H, a deliberate act that obscured vital details and compromised the integrity of the evidence. This manipulation created significant challenges in discerning specific actions or movements in the footage, thereby raising doubts about its reliability.

Rianto's involvement in the manipulation of the footage had far-reaching implications for the trial. The downscaling of the video became a focal point of Wongso's defense, as it was argued that this tampering cast serious doubt on the prosecution's narrative. The defense contended that the compromised footage undermined the credibility of the allegations against Jessica, highlighting the need for rigorous forensic scrutiny to uncover the truth. The digital tampering orchestrated by Rianto and his colleague not only impacted the perception of the events but also brought into question the overall fairness of the legal proceedings.

The case of Jessica Kumala Wongso, and particularly the role of Christopher Hariman Rianto, underscores the critical importance of integrity in forensic analysis. The manipulation of evidence through downscaling was a blatant attempt to distort reality, posing a severe threat to the pursuit of justice. This instance of digital tampering by Rianto and his colleague stands as a stark reminder of the potential for abuse within the forensic field and the necessity for stringent oversight and transparency to maintain trust in the legal process.

Christopher Hariman Rianto deliberately manipulated the CCTV 9 footage to create discrepancies in the coffee's color, thereby strengthening the suspicion of cyanide presence due to the perceived differences. By splitting the footage into two segments with different resolutions, he introduced significant visual inconsistencies that affected the forensic comparison.

In Segment 1, from 15:35 to 16:59, he downscaled the footage to 960x576 pixels with a frame rate of 10 fps. This reduction in resolution resulted in a loss of color detail, making it difficult to accurately capture and analyze the coffee's color when it was served. In Segment 2, from 16:59 to 18:25, the footage remained at the original high-definition resolution of 1920x1080 pixels with a frame rate of 25 fps. The higher resolution in this segment allowed for clearer and more detailed color representation when the coffee cup was taken after Mirna Salihin drank from it.

This deliberate manipulation created a misleading visual comparison. The lower resolution in the first segment obscured fine color details, making the coffee appear different from the second segment's clearer footage. This apparent difference in co