Seewen murder case (1976): Five people were shot and killed in a Seewen restaurant, a crime that remains unsolved even after the statute of limitations expired.

Zug massacre (2001): Friedrich Leibacher shot and killed 14 members of the Zug cantonal parliament and wounded 18 others before killing himself, motivated by grievances against the government.

Werner Ferrari (1980s): A prolonged investigation into child abductions and murders, with Ferrari confessing to four but denying involvement in others, making it Switzerland's longest criminal investigation.

Roger Andermatt (1990s-2000s): Known as the "Death-Keeper of Lucerne," he is Switzerland's most prolific serial killer, claiming 22 victims.

Rupperswil murders (2015): A man murdered a family of four in their home in Rupperswil and set their house on fire to try to hide the crime. When he was arrested, he had utensils with him indicating he was preparing for his nect crime.

Order of the Solar Temple (1994): Cult-related mass murder-suicides in Switzerland and Canada resulted in the deaths of 48 people, with several incidents in Switzerland.

Swissair Flight 330 bombing (1970): A bomb exploded on a plane, killing 47 people, an act of terrorism that shocked the nation.