The arrested, identified as Bharat Yadav, was wanted in connection with the gruesome murder of a youth in Bihar's Bhojpur district, Joint Commissioner of Delhi Police (Crime) Ravindra Yadav said today.
He was carrying a reward of Rs 15,000 on information leading to his arrest.
Several teams of Bihar Police had been on his trail but he kept changing his hideout frequently to evade arrest, said the police officer.
In Delhi, the accused had been running a dhaba in Karol Bagh area. He was arrested by a crime branch team from near Bhairon Temple at Pragati Maidan yesterday.
Afterwards, he escaped with his family to Delhi to evade arrest and was running a dhaba in Karol Bagh with fake identity, the police officer said, adding Bihar Police has been informed about his arrest.