The DNA on a bra clasp left 46 days that decided a murder case
The door to Meredith Kercher's bedroom was locked.
Her flatmate Filomena Romanelli found it that way on the morning of November 2, 2007, and called the police.
They forced it open.
Meredith was under a duvet, in the cottage at 7 Via della Pergola in Perugia.
She had been sexually assaulted and stabbed multiple times in the throat and neck.
The first report of a break-in came from Romanelli and another flatmate, Amanda Knox, an American student who had been in Perugia for about a month.
Knox's boyfriend, Raffaele Sollecito, was also there that morning.
Police initially treated the scene as a burglary gone wrong.
A window in Romanelli's room was broken.
Belongings were scattered.
Who was in that house?
Who left that door locked?
What happened inside the cottage before police arrived is not in the record.
Romanelli and Knox gave their account of the morning.
The police forced the door.
They found the body.
The window was broken.
The belongings were scattered.
A routine morning became a locked door.
A locked door became a violent death.
The cottage held four young women.
One of them was dead.
Three of them were somewhere else that night.
That is what the record shows.
Everything else — the hours before the door was forced — remains a question the case never answered.
THE ARRESTS AND THE ACCUSATION
Knox and Sollecito were arrested within days.
They were charged with murder, sexual violence, and other offenses.
The accusation turned on a statement Knox made under interrogation.
She implicated Patrick Lumumba, her boss at a bar called Le Chic.
Lumumba was arrested.
He was held for two weeks.
Then he was released without charge.
He was later cleared entirely.
Knox's behavior drew suspicion.
She went shopping with Sollecito.
She kissed him at the police station.
The record notes these acts; it does not explain what they proved.
What evidence actually pointed to Knox and Sollecito?
Was it the shopping?
Was it the kiss?
Was it a statement made in a room she said included being hit and threatened?
That would require the interrogation transcript, and the record does not settle it.
Separately, Rudy Guede came into focus.
He was an Ivorian man who knew Kercher.
He had been seen near the cottage.
His DNA was found on Kercher's body and in the room.
His bloody handprint was found on a pillow.
He was identified through DNA evidence and separately tried.
The prosecution's theory was a drug-fueled sexual assault that escalated to murder.
It was a theory.
The motive for the alleged attack was never established in court.
Not because the court forgot.
Because no motive was ever established.
Four days passed between the body being found and the arrests.
The suspicion turned that fast.
It landed on the flatmate who reported the break-in and the boyfriend who was there that morning.
It also landed, briefly, on a bar manager who had nothing to do with it.
The case moved on a current of accusation.
The evidence that would later be called unreliable had not yet been collected properly.
That came next.
THE BRASS CLASP AND THE KNIFE
The key forensic evidence was DNA.
Rudy Guede's DNA was found on Kercher's body and in the room.
His bloody handprint was found on a pillow.
The prosecution argued that Knox's DNA was found on the handle of a kitchen knife believed to be the murder weapon.
The knife was found in Sollecito's kitchen drawer.
No trace of Kercher's DNA was found on the blade.
The prosecution argued that Sollecito's DNA was found on Kercher's bra clasp.
The bra clasp had been left on the floor for 46 days before being collected.
Forty-six days on the floor of a room that police had already entered, examined, and processed.
Was it contaminated? The defense claimed it was.
That is not established. The record does not confirm contamination.
The defense experts cited contamination and sloppy collection procedures.
They challenged the reliability of both findings.
The clasp sat exposed for weeks, and the knife held no trace of the victim.
How could a clasp left for 46 days be trusted?
How could a knife with no victim's blood be the murder weapon?
How could either survive scrutiny?
That would require evidence that had been collected properly.
The prosecution's theory was that Knox and Sollecito joined Guede in a drug-fueled sexual assault that escalated to murder.
No motive was ever established in court.
The case moved on that DNA.
The clasp was the hinge.
It was a small piece of metal on a floor.
It was also the difference between conviction and acquittal.
THE VERDICTS AND THE FLAWS
The clasp was the hinge.
It was a small piece of metal on a floor.
It was also the difference between conviction and acquittal.
Knox and Sollecito were tried together in Perugia.
In December 2009, both were convicted of murder and sexual violence.
Knox was sentenced to 26 years.
Sollecito was sentenced to 25 years.
Guede had been tried separately in a fast-track proceeding.
He was convicted in 2008 and sentenced to 30 years.
That sentence was later reduced to 16 on appeal.
Three people. Three convictions. One victim.
In October 2011, an appeals court in Perugia acquitted Knox and Sollecito.
The court cited a lack of evidence.
It criticized the prosecution's case.
The acquittal was overturned by Italy's Supreme Court in 2013.
A new appeals trial was ordered.
In January 2014, a Florence appeals court convicted them again.
Knox's sentence was set at 28 years and six months.
Then, in March 2015, Italy's Supreme Court definitively acquitted Knox and Sollecito.
The court ruled that the evidence did not support the convictions.
Its written reasoning cited "stunning" flaws in the investigation.
It declared the DNA evidence unreliable.
The clasp had been collected 46 days after the murder.
The knife had no trace of Kercher's DNA on the blade.
The exact nature of those "stunning" flaws is not detailed in the record beyond the DNA unreliability.
What does "definitive" mean here?
It means the final legal word was acquittal.
It means the case flipped four times before that word came.
It means a conviction, an acquittal, a conviction, and an acquittal.
The Supreme Court's 2015 ruling stands as the definitive legal outcome.
The DNA on the clasp was the hinge.
The hinge, in the end, did not hold.
AND THE STORY STILL ISN'T OVER
Knox returned to the United States after her 2011 acquittal.
She wrote a memoir.
She married.
She became an advocate for criminal justice reform.
Sollecito has maintained his innocence publicly.
Guede served his sentence and was released in 2021.
The legal saga, in one sense, is over.
It is also not over.
In 2024, Knox was convicted in an Italian court of slander for accusing Patrick Lumumba of the murder during her 2007 interrogation.
She was sentenced to three years.
She is appealing.
The outcome of that appeal is not in the record.
The Kercher family has consistently maintained that they believe Knox and Sollecito were involved in Meredith's death.
That belief did not end with the acquittal.
It did not end with the Supreme Court's 2015 ruling.
It has outlasted every verdict.
The DNA on the clasp was declared unreliable.
The convictions were thrown out.
The case was closed, legally.
The consequences were not.
A slander conviction still hangs over Knox, pending appeal.
A family still carries a loss they attribute to her.
A man still insists he was innocent.
A man who was convicted has served his time and walked free.
What the record establishes is narrow.
What it does not establish is also narrow.
That would require evidence.
The story, in the end, is not a closed loop.
It is a set of verdicts, a set of appeals, and a set of people still living with them.
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