Apologies for this lengthy post but it will be my last on the subject of DNA. I think it clarifies a few points. More about the case under appeal is in the article.
DNA is like a fingerprint. Police can link you to a crime scene by matching a DNA sample left behind. A prosecutor can use this evidence to support his or her theory that you were present when the crime was committed in an effort to convince the jury beyond reasonable doubt that you are the perpetrator.
Whether your DNA found at the crime scene is enough evidence to convict you was the question in a recent Court of Appeals case. The defendant was convicted of burglarizing a Santa Ana nail salon based solely on DNA evidence. He appealed the judgment, claiming that there wasn’t enough evidence linking him to the crime scene to support his conviction. The Appeals Court agreed.
The defendant’s appeal asked the Court to resolve the question of whether DNA evidence, standing alone, was enough to connect him to the crime.
The appellate panel reasoned that
there must be a connection between an object found at the scene of the crime and the crime itself, rather than just a connection between the object and the defendant.
In the present case, the Court held that the mere presence of the defendant’s DNA on an object found at the crime scene did not, by itself, constitute sufficient evidence necessary to convict him of burglary. Accordingly, the Court reversed Arevalo’s conviction.
Was This Decision Fair? Unquestionably. Convicting a person on criminal charges requires proof beyond a reasonable doubt that the defendant did in fact commit the crime.
DNA evidence found at the crime scene doesn’t necessarily implicate you without other corroborating evidence.
While DNA evidence may be considered the same as a fingerprint, and can link a suspect to a crime, a criminal conviction requires much more. Our criminal justice system depends on irrefutable proof that the defendant was not only present when the crime was committed, but also that he or she is, in fact committed the crime.
The Court in this case was asked to weigh the question of whether DNA is such convincing evidence, that nothing else matters. The court said No.
https://www.southerncaliforniadefenseblog.com/2014/06/dna_evidence_left_at_the_crime.html