Police have arrested two men who worked at the eatery in this connection and they are being questioned to ascertain the exact sequence of events which led to the lawyer's murder.
Deputy Commissioner of Police (North) Madhur Verma said with the arrest of the two persons, the case has been cracked.
The victim, identified as Rajeev Sharma, was a resident of Rohini in northwest Delhi. There were wounds on his head which were probably caused by a sharp object following a scuffle.
Meanwhile, lawyers of all district courts abstained from work today following the incident.
"A young advocate's body has been found in the court complex and he has been murdered. This is a serious issue. We are yet to know what he was doing here late night. All the lawyers have decided to abstain from work today.
"Lawyers in all the six district courts in Delhi will not work today," advocate Sanjeev Nasiar, President of Tis Hazari Bar Association said.