Oshiwara Police arrested Vikram Singh (23) in Bandra (East) and handed him over to their Versova counterparts.
Garbage collector Vishal Tak (20) and watchman of the building Shiv Kamal (20) were arrested on the day of the incident itself, but Singh was absconding.
Police also recovered the jewellery stolen by the three.
They said the accused went to Sabatina’s flat when her husband Victor had gone out.
They rang the bell and as she opened the door attacked her with a knife and ran away with jewellery she was wearing.
“Tak and Shivkamal confessed to the crime and named Singh,” said an officer at Versova Police Station.
Singh, who works as a spot boy and resides in Nerul, had gone underground after police arrested his accomplices.