The Macedonian citizen was jailed by a Schwyz cantonal court after being convicted of the two murders.
The man admitted to using a pistol to shoot his 48-year-old spouse and his 24-year-old daughter in the family home in Einsiedeln (canton of Schwyz) on May 28th 2011, although his lawyer argued that it was a “crime of passion”, the SDA news agency reported.
His daughter died in the home while his wife died in hospital from her wounds.
The convicted murderer was convinced that the two women shared the same lover, the court was told.
He armed himself and began to make “checks” around the house in a bid to seek evidence, which he never found, the prosecutor Paul Schmidig said.
The husband then threatened his wife and daughter and instigated a “reign of terror” in the house, Schmidig said, according to the SDA report.
The prosecutor said the man acted without scruples, motivated by morbid jealousy and a sick frenzy.
The man behaved in a selfish manner and did not show any emotion, said Judge Sandra Rieder, who ordered institutional therapy for the convicted man.
He was also found guilty of attempting to murder his other daughter, a fact the Macedonian denied, SDA reported.
As well, he was convicted of possessing a firearm without a permit.