The man, who is in his thirties, was remanded into custody for the murder on Saturday morning.
Police were dispatched to the apartment in the town after the man had called into emergency services and confessed to having killed the woman, who was in her forties.
The operator kept the man talking on the phone after it had been concluded that there were strong grounds to suspect that a crime had been committed. When the police unit arrived at the home at 7.20pm they found a dead woman and immediately arrested the man.
“It was impressive work by the operator,” said police spokesperson Stefan Gustavsson who confirmed that the arrest was completed without complications.
The man was interviewed during the night in Lidköping and his statements formed the basis of the decision to remand him in custody on Saturday morning.
Police have not yet been able to establish the exact cause of death but have established that the woman was subjected to aggravated assault.
The case has been classified as murder.