Psycho killer udyan killed some other people too?

Bhopal. West Bengal Police has returned from Raipur along with serial killer Udyan. However police officials are still clueless as how many people psycho killer Udyan Das has killed. Several mobile phone numbers of the young women he had come in contact are switched off and his sister is also missing.
The investigation conducted so far has revealed that Udyan had killed a 28-year-old woman of West Bengal whose ody was recovered from his
Saket Nagar house and around sx years ago killed both of his parents in Raipur. Their bodies have also been recovered from Sunder Nagar house in Raipur two days ago. After four days of investigation and revelation of three murders by the accused, the question remains as how many persons he has killed so far. SP Bhopal (South) Siddhartha Bahuguna said that there are several aspects which are under investigation and details have to be verified before confirming as revelations has been made by the accused. The key to the revealing of crimes and killings by the accused is the search of the places where he had lived and was staying at the time of the arrest and possibly his close aides whom he had shared secrets, he added.
In the investigation it was found that Udyan was in relationship with a girl which remains missing. The girl was among the last persons who remained in contact and was said to be close to the accused.
Police suspects that the girl was acquainted with Udyan for long and had rejected his proposal of marriage and due to which Udyan has planned to kill her but details of the girl could not be ascertained at the moment as the details are yet to be verified.
After the details of the death of deceased’s mother surfaced investigation into the fake death certificate has been started. The accused obtained death certificate of her mother from Municipality of Itarsi. Police have recovered a  passport which was made in the year 2014 but it was not having any details of foreign trips which suggest that Udyan might have obtained a fake passport. Meanwhile, Bankura police have accompanied the accused to West Bengal for further investigation.