On 1 December 2006, 51-year-old Jukka S. Lahti, a social psychologist and father of four, was killed at his family home in Ulvila, Finland. His wife, Anneli Auer (born 1965), telephoned emergency services at 02:43 and reported that a masked assailant had attacked her husband. Lahti had been stabbed multiple times and struck on the head with a blunt object, and Auer had also been wounded.
Investigators initially searched for an outside perpetrator and detained or arrested several people. One police hypothesis held that the killing was revenge connected to Lahti's work as a human-resources director at a company that had carried out large layoffs. In the spring of 2008, police tested the DNA of hundreds of that company's employees, but none matched unidentified DNA recovered from the scene. That unknown DNA was later attributed to a police investigator.
In August 2008 a new chief investigator took over, and attention turned to Auer's emergency call, which police said contained no evidence of an outside attacker; the recording was also examined by the FBI. An undercover officer befriended and dated Auer for seven to eight months, and police monitored her phone and home for three days. A police representative said the operation produced neither incriminating nor exonerating evidence. Auer was arrested on 28 September 2009 on the theory that she had killed Lahti during the call and staged the scene.
Auer was tried before a three-judge panel at the Satakunta District Court and convicted in November 2010, with one judge voting to acquit. The Vaasa Court of Appeal unanimously acquitted her in July 2011. In October 2012 the Supreme Court of Finland returned the case to the district court after prosecutors presented new evidence.
In 2013 it emerged that the crime-scene DNA sample had been contaminated and that the unidentified male DNA belonged to a crime-laboratory examiner. The district court convicted Auer again in December 2013 by a 2-1 vote and imposed a life sentence, but the Vaasa Court of Appeal overturned that conviction in February 2015, finding that the presence of an outside perpetrator could not be ruled out. In December 2015 the Supreme Court dismissed the prosecution's appeal, making the acquittal final. Auer had spent more than 600 days in custody and was awarded roughly 500,000 euros in compensation in 2016. That year, more than 50 police officers were charged for improperly accessing her records in a police database, and most were fined.
Key facts
- Victims
- Jukka S. Lahti
- Date
- 2006
- Location
- Ulvila, Finland
- Case status
- unsolved
Case timeline
2006-12-01
Jukka S. Lahti is killed at the family home in Ulvila; Anneli Auer calls emergency services at 02:43 and reports a masked assailant.
2008
Police test the DNA of hundreds of employees of Lahti's former employer; none match unidentified DNA from the scene, later attributed to a police investigator.
2008-08
A new chief investigator takes over and the inquiry shifts to Auer's emergency call.
2009-09-28
Anneli Auer is arrested and charged with the murder.
2010-11
The Satakunta District Court convicts Auer; one of the three judges votes to acquit.
2011-05
The Supreme Court of Finland orders the National Bureau of Investigation to disclose information about the undercover operation to Auer.
2011-07
The Vaasa Court of Appeal unanimously acquits Auer of all charges.
2012-10
The Supreme Court returns the case to the Satakunta District Court after prosecutors present new evidence.
2013
Reports indicate the crime-scene DNA sample was contaminated; the unidentified male DNA is traced to a crime-laboratory examiner.
2013-12
The Satakunta District Court convicts Auer again in a 2-1 ruling and imposes a life sentence.
2015-02
The Vaasa Court of Appeal overturns Auer's second conviction, finding an outside perpetrator could not be ruled out.
2015-12
The Supreme Court dismisses the prosecution's appeal, making Auer's acquittal permanent.
2016
Auer is awarded about 500,000 euros in compensation for wrongful imprisonment; over 50 police officers are charged for improperly accessing her records.
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People
Anneli Auer
ACQUITTEDThe victim's widow; arrested in September 2009 and charged with the murder. Convicted twice in district court, but both convictions were reversed on appeal, and her acquittal became final when the Supreme Court of Finland dismissed the prosecution's appeal in December 2015.
Jukka S. Lahti
VICTIM51-year-old social psychologist and father of four, killed at his family home in Ulvila on 1 December 2006.
Roles reflect public records and court outcomes at the time of writing — supporting citations are on file under Sources.
Archival records
unclassified
Anneli Auer
Credit: Soppakanuuna · CC BY-SA 4.0 · Source
Places
Common questions
- What happened to the victim?
- In 2006, social psychologist Jukka S. Lahti was killed at his home in Ulvila, Finland; his widow was tried repeatedly and permanently acquitted in 2015, and the case remains unsolved.
- Where did the killing happen?
- Ulvila, Finland.
- What is the current status of the case?
- Status: unsolved. Last verified July 2026.
Related cases
View all cases
Sources
- ENCYCLOPEDIC2006 Ulvila homicide caseWikipedia · 2026-07-05
- PRESSLife sentence given to wife in Ulvila murder caseHelsingin Sanomat · 2026-07-05
- PRESSKRP vahvisti peitetoiminnan Ulvilan surmatutkinnassa (National Bureau of Investigation confirms undercover operation in the Ulvila homicide inquiry)Yle · 2026-07-05
Record history
- First published
- JUL 06, 2026
- Last verified against sources
- JUL 06, 2026