The accused, Mukesh Kumar Vishnoi, was nabbed from Mathura in Uttar Pradesh. A reward of Rs 20,000 had been declared by Delhi Police commissioner for his arrest, said Romil Baaniya, DCP (Southeast).
Two of the accused, Mobin Azad and Saifiand Prakash were arrested earlier but accused Vishnoi was absconding, said the officer, adding that he had even stopped using his mobile phone and kept changing his addresses frequently to avoid detection by the investigation team.
"He got to know that Mukesh Kumar Vishnoi will be coming to Mathura from Jaipur by bus to meet someone. He conveyed the information to senior officers who constituted a raiding team. The team laid a trap at New Bus Stand, Bhuteshwar, Mathura.
"At about 3.30 AM, a bus coming from Jaipur stopped there. When passengers were deboarding the bus, Vishnoi was apprehended," the officer added.
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On May 20, Masonda Ketada Olivier (23), was allegedly beaten to death by three youths following a brawl over hiring an auto-rickshaw in Vasant Kunj area.
According to police, the incident took place around midnight of May 20 when Olivier was returning from the residence of a Congolese friend at Kishangarh locality in Vasant Kunj. While he waited for an auto-rickshaw, his friend who accompanied him went to a nearby shop to buy cigarettes.
When an auto-rickshaw arrived there, a group of three men, heading towards Mehrauli, stepped inside the vehicle before Olivier could. This led to a heated exchange of words which soon turned into a brawl.
Following the incident External Affairs Minister Sushma Swaraj had assured that India was committed towards the safety and security of African nationals.
Her junior minister V K Singh met the representatives of African heads of missions to assuage their concerns while strongly condemning the killing of the youth.
Vishnoi had been declared a proclaimed offender by a court on November 8. Several teams in South Eastern Range were constituted to arrest him.