Police is also stepping up searches in south India and Maharashtra for Swami Pratimanand, who is suspected to have given money to two alleged shooters, one of whom is his driver Purushottam Rana, to kill Deepak Bhardwaj.
Pratimanand hails from Beed in Maharashtra.
Bhardwaj was shot dead in his farmhouse in south Delhi's Rajokri on March 26 allegedly by Rana and Sunil Mann.
Though police is yet to catch the spiritual guru, they have tried to piece together the motive for the murder which they believe is related to a dispute over a farmhouse in Bahadurgarh.
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Sources said though they have versions from the alleged shooters that the spiritual guru had hired the shooters, investigators are yet to give a clean chit to the family of Bhardwaj, a clerk who became real estate tycoon with interests in education sector and was the richest candidate of the last Lok Sabha elections.
On the spiritual guru, the official said he last got in touch with his family last November during Diwali.
"He had come to Delhi and became a Yoga teacher in outer Delhi. In order to ensure that he is not caught, he left Delhi two days before Bhardwaj was killed.
"He stayed in Haridawar between March 25 and 30," the official said, adding when his hiding, he changed his appearance several times.
Pratimanand also met one of his friends Avinash Shastri on March 30 in Indore and he stayed there for four days.
The sources also said Pratimanand had applied for passport six months ago and the passport verification form was recovered from Haridawar.
During investigations, police also checked his bank accounts but there was not much money.
The sources also said Rana accompanied Pratimanand whenever he used to meet Bhardwaj. Investigators said Pratimanand has changed his mobile phone numbers at least ten times in the past fortnight and he was making calls from public booths.
He is changing his locations, they said.
Police are also planning to approach court to get a non-bailable warrant executed against him besides alerting airports and railway stations through a look out notice.