A man who was released early from a prison sentence for the murder of his wife has received a life sentence for killing his girlfriend.

The man, 56, was first sentenced to life in prison 28 years ago for killing his wife in 1989. In 2000, his prison sentence was reduced to 20 years and he was released seven years later, having spent 18 years behind bars.

He was recently arrested again, this time as the suspect of the murder of the 50-year-old woman he was living with. The woman was stabbed at their house in Incheon on Aug. 18. The two had lived together for a year.

According to police investigation, the suspect admitted to killing the victim due to trouble stemming from financial difficulties and the killer’s suspicion that his victim had had an affair with another man.

Incheon District Court said Wednesday that the man was sentenced to a life imprisonment and to wear a GPS-tracking device for the next 30 years.

Apart from the second murder, the convict received five years from a court in 2010 for incarcerating and raping a female companion.

The court said the killer should be permanently segregated from society, as he had shown no penitence or improvement in his attitude.

By Lim Jeong-yeo (kaylalim@heraldcorp.com)