The nine youth, accused of gangraping a 20-year-old call centre employee, are no hardcore criminals but mostly jobless youth, police said.
Some of them were also involved in petty thefts to meet their daily expenses, police added.
The Faridabad police, who have already arrested one accused, is investigating the track record of all the named and un-named accused in the case.
At least five people have been named in the case registered at the Sector 55 police station while about an equal number of accused have not been named, or identified as yet.
Among those who have been identified till now are Inderjeet, Barti, Lukka, Santau and Naveen Kumar. All of them are residents of Jadsanti area, near NH-2 (Mathura Road), in Faridabad district. Four unknown persons have also been made accused in the case.
"Initial investigation suggests that the accused have been involved in petty thefts," said deputy commissioner of police (DCP), Ballabgarh, Raj Kumar Vaishisht. He added, "We are interrogating one of the arrested accused and a lot depends on his disclosures."
Police officers involved in the investigations said some of the accused belonged to wealthy families and did nothing.
"The accused do nothing and survive on their family money," police officials said.
"Five police teams have been formed to arrest the remaining accused and we are hopeful that all of them will be nabbed soon," Vashisht said. Police have also been conducting raids on the possible hideouts of the accused in Jadsanti.
The police record of all the named accused is being verified. "We are verifying if other cases are registered against any of the accused in any other police station of Faridabad or elsewhere," Vaishisht said.