Maria, who took charge of his new post over a week ago, held a review meeting here with investigators and is believed to have pulled them up for lack of progress in the case and asked them to show results.
The Crime Branch-led investigating team includes a Deputy Commissioner of Police and personnel from property and anti-robbery cells.
The Mumbai police chief asked the team members to show results at the earliest, sources said. "The Commissioner was not happy with the progress of the case. He wants results as early as possible," they added.
The 23-year-old, a native of Machilipatnam in Andhra Pradesh, was employed with IT major TCS at its office in suburban Goregaon.
Police yesterday released the photograph of a man who was spotted with her in a CCTV footage at the station. The man was carrying Esther's luggage.