By Satu 
Samuli Lammi is a Finnish man known for the murder of a 19-year-old woman in Ikaalisi in 2011. The case gained national attention due to the victim’s diary and the harassment that preceded the relationship.
Lammi’s public history is not limited to one crime. Since his release, he has been involved in several legal processes, some of which have resulted in convictions and some in the dismissal of charges.
Samuli Matias Lammi was born in 1989. He graduated from Ikaalinen Upper Secondary School and began studying business administration at the University of Applied Sciences. As a young man, he also played football as a goalkeeper.
Lammi did not become famous through sports, work or entertainment. His name only became public in connection with a serious homicide. There is no confirmed information about his current profession or everyday life.
Lammi briefly dated a 19-year-old woman. She wanted to end the relationship and cut off contact, but Lammi did not accept the situation. He continued to contact her and visited her home.
Before the murder, Lammi had been convicted of two counts of deprivation of liberty against the same woman. The woman had also tried to get help in the situation. The case has subsequently raised a debate about stalking and its dangerous consequences.
In January 2011, Lammi went to his former dating partner’s home in Ikaalisi. He had obtained the woman’s personal diary and read writings about the relationship in it.
The situation led to an argument, during which Lammi strangled the woman to death. The court found him guilty of manslaughter and disturbing the peace of a cemetery. Lammi was 21 years old at the time of the crime.
The victim’s diary played a central role in the events of the crime and the trial. That is why the case began to be referred to in public as the Ikaalinen diary murder or diary murder.
However, diary murder is not the official crime title for the case. Lammi was convicted of manslaughter, not murder. This distinction is important because manslaughter and murder are assessed on different grounds in the Finnish Criminal Code.
The Pirkanmaa District Court sentenced Lammi to ten years in prison for manslaughter and disturbing the peace of a cemetery. The Turku Court of Appeal upheld the main content of the judgment.
Lammi was a first-time offender in the criminal sense. Therefore, he served the portion of the prison sentence prescribed by law and not the entire ten-year period.
While in prison, Lammi studied business administration and graduated with a degree in business administration. He also participated in rehabilitation and prepared to return to normal life after his release.
In an interview published in 2016, he said he understood that his criminal record would follow him for a long time. However, he expressed his desire to return to society and move on with his life.
During his prison break, Lammi was accused of a sexual offense. The District Court sentenced him, but the Turku Court of Appeal later overturned the conviction due to insufficient evidence.
The persecution charge later brought against Lamme was also dismissed. These cases should not be described as final judgments, as the charges were not successful in the final decisions.
In 2019, Lammi was convicted of assault and rape. The assault was directed at a pregnant woman, who sustained injuries in the incident. The rape was a separate incident and was directed at another woman.
The Pirkanmaa District Court sentenced him to two years of unconditional imprisonment in December 2020. The exact details of the sexual offense were largely kept secret to protect the victim’s privacy.
Lammi was in the Canary Islands in early 2022, awaiting the appeal hearing of the verdict given in Finland. In Spain, he again had to deal with the authorities due to a crime against his former partner.
Only limited information was published about the case in Finland. Based on the news coverage, Lammi was arrested and convicted of a crime against a woman in the Canary Islands.
Lammi’s name was in the news again in October 2026. He was charged with smuggling in the Pirkanmaa District Court. The trial was scheduled to begin on October 6.
The latest suspected crime differs from his previous violent crimes. However, an accusation does not automatically mean guilt, so the matter should not be called a conviction without a court-confirmed decision.
There is no reliably confirmed information about Samuli Lammi’s current relationship, family, work, or exact place of residence. Allegations about his private life are circulating, especially on discussion boards and social media.
There have also been allegations online about his activities on dating services and using different names. These reports have not been confirmed by official sources, so they should not be treated as reliable information.
The Ikaalinen diary murder is remembered especially for how long-term harassment and jealousy led to serious violence. The case shows why it is important to take unwanted contact and threatening behavior seriously.
Lammi’s criminal history includes both final convictions and dismissed charges. Therefore, when writing about the case, criminal charges, court decisions, and unfinished cases must be kept clearly separate.
Ikaalisten tapausta on käsitelty myöhemmin suomalaisissa true crime -kirjoissa ja podcasteissa. Linda Rantasen vuonna 2023 ilmestynyt kirja Jos en saa sinua käsittelee mustasukkaisuuteen liittyviä henkirikoksia, ja yksi sen tapauksista pohjautuu Ikaalisten tapahtumiin.
Myös Motiivina mustasukkaisuus -podcast on käsitellyt tapausta. Sen lähteinä käytettiin tuomioistuinten asiakirjoja, poliisin julkista esitutkinta-aineistoa ja suomalaisten tiedotusvälineiden uutisia.
Tapauksen taustalla ollut pitkäkestoinen häirintä on tärkeä osa tapahtumien kokonaisuutta. Suhteen päättyminen ei lopettanut yhteydenottoja, vaikka nainen oli ilmaissut selvästi haluavansa eroon Lammesta.
Toistuvat puhelut, ei-toivotut vierailut, seuraaminen ja yritykset hallita toista voivat olla vainoamisen merkkejä. Apua kannattaa pyytää poliisilta tai tukipalveluilta mahdollisimman aikaisin, jos käytös aiheuttaa pelkoa.
Rikostapauksesta kirjoitettaessa huomion pitäisi pysyä vahvistetuissa tapahtumissa. Uhrin yksityiselämää tai päiväkirjan henkilökohtaista sisältöä ei ole tarpeellista kuvata yksityiskohtaisesti.
Myös uhrin läheiset tulee huomioida hienotunteisesti. Tapaus ei ole vain tunnettu rikoskertomus, vaan todellinen tapahtuma, joka aiheutti pysyvää surua nuoren naisen perheelle ja muille läheisille.
Lammin nykyisestä elämästä on julkaistu paljon vahvistamattomia väitteitä. Keskustelupalstoilla on arvailtu hänen asuinpaikkaansa, ihmissuhteitaan, taloudellista tilannettaan ja toimintaa deittipalveluissa.
Tällaisia tietoja ei pidä esittää faktoina ilman luotettavaa lähdettä. Hänen nykyinen työnsä, mahdollinen puolisonsa, lapsensa ja tarkka asuinpaikkansa eivät ole julkisesti vahvistettuja.
Vuoden 2011 teosta käytetään yleisesti nimeä päiväkirjamurha, mutta Lammi tuomittiin oikeudessa taposta. Sanalla murha voidaan viitata tapaukseen mediassa annettuna nimenä, mutta sitä ei pidä esittää virallisena rikosnimikkeenä.
Samalla tavalla syyte ja tuomio on erotettava toisistaan. Vuonna 2026 esille tullut salakuljetussyyte kertoo oikeusprosessin alkamisesta, mutta syyte ei yksin todista henkilön syyllisyyttä.
Samuli Lammi tunnetaan ennen kaikkea vuoden 2011 Ikaalisten päiväkirjasurmasta. Hän sai taposta ja hautarauhan rikkomisesta kymmenen vuoden vankeusrangaistuksen. Myöhemmin hänet tuomittiin myös raiskauksesta ja pahoinpitelystä.
Tapaus muistuttaa vainoamisen ja hallitsevan käyttäytymisen mahdollisista vaaroista. Samalla se osoittaa, miksi rikoksista kirjoitettaessa on tärkeää käyttää täsmällisiä rikosnimikkeitä, kunnioittaa uhreja ja erottaa vahvistetut tiedot internetissä leviävistä huhuista.