LEGAL MEDICINE (SY 2013-2014) comprising the sperm specimen is identical to Yatar’ Yatar ’s
PEOPLE VS. YATAR (2004) ( 2004)
genotype. FACTS: On June 30, 1998, Kathylyn Uba stayed in her
Yatar was accused of the special complex crime of Rape
grandmother’ grandmother’s (Isabel Dawang’ Dawang’s) house, despite her
with Homicide and was convicted for the same by the
intention to go forth Tuguegarao City, as her other
Regional Trial Court of Tabuk, Kalinga. Thereafter, he
former’ former ’s housemate-relatives left in the morning. At
made an appeal to the Honorable Supreme Court in
10:00 am, accused-appellant Joel Yatar was seen at the
order to assail the court a quo’ quo ’s decision.
back of the same house where Kathylyn stayed during said date. At 12:30 pm, Judilyn, Kathylyn’ Kathylyn’s first cousin
On appeal, Yatar avers that: (1) the trial court erred in
saw Yatar, who was then wearing a white shirt with collar
giving much weight to the evidence DNA testing or
and black pants, descended from the second floor and
analysis done on him, in lieu of the seminal fluid found
was pacing back and forth at the back of Isabel
inside the victim’ victim’s (cadaver) vaginal canal; (2) the blood
Dawang’ Dawang’s house, Judilyn didn’ didn’t find this unusual since
sample taken from is violative of his constitutional right
Yatar and his wife used to live therein. At 1:30 PM, Yatar
against self-incrimination; and the conduct of DNA
called upon Judilyn, telling the latter that he would not
testing is also in violation on prohibition against ex-post
be getting the lumber he had been gathering. This time,
facto laws.
Judilyn noticed that Yatar is now wearing a black shirt (without collar) and blue pants; and noticed that the latter’ latter’s eyes were “reddish and sharp” sharp”. Accused-appellant
MAIN ISSUE
asked about the whereabouts of Judilyn’ Judilyn’s husband, as the former purports to talk with the latter. Then, Yatar
Whether or not the result of the DNA testing done on
immediately left when Judilyn’ Judilyn’s husband arrived. In the
the sperm specimen may be used as evidence for Yatar ’s
evening, when Isabel Dawang arrived home, she found
conviction?
the lights of her house turned off, the door of the ground floor opened, and the containers, which she asked Kathylyn to fill up, were still empty. Upon
HELD
ascending the second floor to check whether the teenage girl is upstairs, Isabel found that the door therein was tied with rope. When Isabel succeeded opening the tied door with a knife, and as she groped in the darkness of the second level of her house, she felt Kathylyn’ Kathylyn ’s lifeless and naked body, with some intestines protruding out from it. Soon after, police came to the scene of the crime to provide assistance. Therein, they found Kathylyn’ Kathylyn’s clothes and undergarments beside her body. Amongst others, a white collared shirt splattered with blood was also found 50-meters away from Isabel’ Isabel’s house. Meanwhile,
Noteworthy is the fact this case was decided on 2004, which was three (3) years before the Rules on DNA evidence took effect. The Supreme Court in this case ruled based on the US case of Daubert vs. Merrell Dow as a precedent. In the said US jurisprudence, it was ruled that pertinent evidence based on scientifically valid principles could be used, so long as the same is RELEVANT and RELIABLE. Hence, it was called then as the DAUBERT TEST.
semen
has
also
been
found
upon
examination of Kathylyn’ Kathylyn’s cadaver. When subjected under DNA testing, results showed that the DNA
PREPARED BY: TINA SIUAGAN
RULE: At present, SECTION 7, RULES ON DNA EVIDENCE may be used as the legal basis. Sec. 7 of the Rules on DNA evidence, which took effect on 2007, provides for the factors to be
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LEGAL MEDICINE (SY 2013-2014) considered in assessing the probative weight or
from the victim’ victim’s vaginal canal, the trial
value to be given on evidence derived or
court considered the qualification of the
generated from DNA testing. Such factors, are,
DNA analyst, the facility or laboratory in
to wit:
which the DNA testing had been (a) The chain of custody, including how the
performed, and the methodology used
biological samples were collected, how
in performing the DNA test. In the said
they were handled, and the possibility of
case, the DNA test was done at the UP National Science Research Institute
contamination of the samples; (b) The DNA testing methodology, including the
(NSRI) . The method used was Polymerase chain reaction (PCR) amplification method by Short
procedure followed in analyzing the samples,
the
advantages
and
disadvantages of the procedure, and
Tandem Repeat (STR) analysis , which
compliance with the scientifically valid standards in conducting the tests; (c)
enables a tiny amount of DNA sequence
The forensic DNA laboratory, including
to be replicated exponentially in a span
accreditation
reputable
of few hours. Hence, sufficient DNA
standards-setting institution and the
analysis may be made easier even with
qualification
who
small DNA samples at hand. The analyst
conducted the tests. If the laboratory is
who performed the procedure was Dr. Maria Corazon Abogado de Ungria,
by of
any the
analyst
not accredited, the relevant experience of the laboratory in forensic casework and
credibility
shall
be
who is a duly du ly qualified expert witness on
properly
DNA print or identification techniques.
established; and (d) The reliability of the testing result, as hereinafter provided.
CONCLUSION:
APPLICATION – DAUBERT TEST:
Hence,
apart
from
the
other
sets
of
The Honorable Supreme Court in this case
circumstantial evidence correctly appreciated by
upheld the probative value of the DNA test
the trial court, the said DNA evidence is
result yielded from the analysis of Yatar’ Yatar ’s blood
sufficient to be admitted as evidence to warrant
sample from that of the semen specimen
the accused-appellant’ accused-appellant’s conviction of the crime
obtained from the cadaver’ cadaver ’s vaginal canal.
of Rape with Homicide.
Accordingly, it held that the DNA evidence is both reliable and relevant.
In ascertaining the relevance of the evidence
in
a
case,
it
must
be
ANNOTATIONS – WHAT IS DNA? – culled from this case
determined whether or not the same directly relates to a fact in issue, as to
DNA is a molecule that encodes the genetic
induce belief in its existence or non-
information in all living organisms.23 A person’s
existence. In this case, the evidence is
DNA is the same in each cell and it does not
relevant in determining the perpetrator
change throughout a person’s lifetime; the DNA
of the crime;
in a person’s blood is the same as the DNA
In giving probative value on the DNA
found in his saliva, sweat, bone, the root and
testing result, yielded from the analysis
shaft of hair, earwax, mucus, urine, skin tissue,
of Yatar’ Yatar’s blood sample from that of the
and vaginal and rectal cells.24 Most importantly,
biological
because of polymorphisms in human genetic
sample
PREPARED BY: TINA SIUAGAN
(semen)
obtained
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LEGAL MEDICINE (SY 2013-2014) structure, no two individuals have the same DNA, with the notable exception of identical twins;
DNA print or identification technology has been advanced as a uniquely effective means to link a suspect to a crime, or to exonerate a wrongly accused suspect, where biological evidence has been left. For purposes of criminal investigation, DNA identification is a fertile source of both inculpatory and exculpatory evidence. It can assist immensely in effecting a more accurate account of the crime committed, efficiently facilitating the conviction of the guilty, securing the acquittal of the innocent, and ensuring the proper administration of justice in every case.
DNA evidence collected from a crime scene can link a suspect to a crime or eliminate one from suspicion in the same principle as fingerprints are used.26 Incidents involving sexual assault would leave biological evidence such as hair, skin tissue, semen, blood, or saliva which can be left on the victim’s body or at the crime scene. Hair and fiber from clothing, carpets, bedding, or furniture could also be transferred to the victim’s body
during
the
assault.27
Forensic
DNA
evidence is helpful in proving that there was physical contact between an assailant and a victim. If properly collected from the victim, crime scene or assailant, DNA can be compared with known samples to place the suspect at the scene of the crime.
PREPARED BY: TINA SIUAGAN
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