Paul Yong rape trial: Only chemical analysis can accurately determine type of bodily fluid, witness tells court
IPOH: Bodily fluids can only be differentiated accurately using a detailed chemical analysis and not with the Polilight gadget used by the police forensic team, the High Court heard.
Police forensic field investigating officer Inspector V. Simon agreed to this when testifying in the rape trial of former Perak executive council member Paul Yong on Tuesday (July 13)
He was replying to a question posed by Yong's lead counsel, Datuk Rajpal Singh, suggesting that differentiating bodily fluids such as semen, vaginal fluid or urine requires specific checks, and could not be confirmed with just the Polilight gadget.
Simon, who is with the Perak police headquarters, said the forensic team would usually conduct checks using a Polilight which shows different colours for specific fluids.
"Marking will be made and the specimen will be sent to the Chemistry Department for further tests and confirmation.
"For example, when we check for semen stains, the Polilight will show a white transparent liquid, which is then categorised as suspected semen. For blood, the light would be a darker colour.
"However, the samples are sent to the (Chemistry) Department for further analysis," he added.
On another question by Rajpal if the investigating officer should alert forensic teams earlier to the site of the incident and not after 22 hours, Simon agreed that the timeframe was too long.
Rajpal said the alleged incident occurred at about 9.15pm on July 7, 2019.
A police report was only lodged the next day and the forensic team arrived at the scene on July 9, 2019 at about 12.10pm.
Simon also agreed that the victim led the team to the scene and showed them where the alleged rape took place.
However, he disagreed with the counsel that the stains on the bed sheet, which he suspected to be semen, were old.
"For the mop seized from the back of the house, Polilight was not used for fluid detection because the mop had already been washed and I wanted to the (Chemistry) Department to do analysis.
"Despite it being washed, between 40% and 50% of semen traces can be detected by a detailed analysis," he added.
To another question by another counsel Salim Bashir, Simon agreed that items could be disturbed by others present before the forensic team arrived.
In reply to a question by Deputy Public Prosecutor Liyana Zawani Mohd Radzi, Simon said the team used two different light sources – purple and blue – to see what sort of stains can be found.
On Aug 23, 2019, Yong claimed trial at the Ipoh Sessions Court to raping his then 23-year-old maid.
The offence was allegedly committed in a room on the top floor of this house in Meru Desa Park between 8.15pm and 9.15pm on July 7 of that year.
The trial is expected to continue until Friday. (July 16)
Police forensic field investigating officer Inspector V. Simon agreed to this when testifying in the rape trial of former Perak executive council member Paul Yong on Tuesday (July 13)
He was replying to a question posed by Yong's lead counsel, Datuk Rajpal Singh, suggesting that differentiating bodily fluids such as semen, vaginal fluid or urine requires specific checks, and could not be confirmed with just the Polilight gadget.
Simon, who is with the Perak police headquarters, said the forensic team would usually conduct checks using a Polilight which shows different colours for specific fluids.
"Marking will be made and the specimen will be sent to the Chemistry Department for further tests and confirmation.
"For example, when we check for semen stains, the Polilight will show a white transparent liquid, which is then categorised as suspected semen. For blood, the light would be a darker colour.
"However, the samples are sent to the (Chemistry) Department for further analysis," he added.
On another question by Rajpal if the investigating officer should alert forensic teams earlier to the site of the incident and not after 22 hours, Simon agreed that the timeframe was too long.
Rajpal said the alleged incident occurred at about 9.15pm on July 7, 2019.
A police report was only lodged the next day and the forensic team arrived at the scene on July 9, 2019 at about 12.10pm.
Simon also agreed that the victim led the team to the scene and showed them where the alleged rape took place.
However, he disagreed with the counsel that the stains on the bed sheet, which he suspected to be semen, were old.
"For the mop seized from the back of the house, Polilight was not used for fluid detection because the mop had already been washed and I wanted to the (Chemistry) Department to do analysis.
"Despite it being washed, between 40% and 50% of semen traces can be detected by a detailed analysis," he added.
To another question by another counsel Salim Bashir, Simon agreed that items could be disturbed by others present before the forensic team arrived.
In reply to a question by Deputy Public Prosecutor Liyana Zawani Mohd Radzi, Simon said the team used two different light sources – purple and blue – to see what sort of stains can be found.
On Aug 23, 2019, Yong claimed trial at the Ipoh Sessions Court to raping his then 23-year-old maid.
The offence was allegedly committed in a room on the top floor of this house in Meru Desa Park between 8.15pm and 9.15pm on July 7 of that year.
The trial is expected to continue until Friday. (July 16)
Sounds like this investigation has been botched.
ReplyDelete“…. the alleged incident occurred at about 9.15pm on July 7, 2019.
A police report was only lodged the next day and the forensic team arrived at the scene on July 9, 2019 at about 12.10pm….”
More than 36 hours had lapsed before forensic evidence was collected. The scene of the alleged crime was not sealed or cordoned off. Someone could have been planted evidence or contaminated the scene. Furthermore a maid would have easy access to body fluids of everyone living there.
Not saying he is innocent but throw the case out.
Shitful...oops...Saiful DNA "evidence" 3 days from his "pristine" constipated ass was accepted.
DeleteIf the authorities want to accept the evidence they will do it, y hook or by Crook.
Presence of hairs, body fluids on bedsheets, around the house, mops does not prove rape. It was his own house!
ReplyDeleteHopefully the purported victim had not washed herself and the forensics, doctors, had collected samples asap from her. That would build a stronger prosecution case. And we wait to see if there were any witnesses, corroborative evidence, historical complaints, past police reports or reports to the Indonesian embassy etc.