However, the officials added that Bishnoi has refused to disclose the names of his associates – the 'real conspirators' – behind the killing.
“He has revealed that Goldy Brar was one of the gang members who conspired and executed the killing of Moose Wala but has not yet disclosed the names of other associates who were the real conspirators and executioners of the killing,” the official was quoted as saying.
Meanwhile, Lawrence Bishnoi's nephew, Sachin Bishnoi, also took responsibility for the singer's murder, The New Indian Express reported.
On 29 May, Moose Wala was shot dead by unidentified assailants in Punjab's Mansa district, a day after the state government curtailed his security cover. His cousin and a friend, who were travelling in a jeep with him, were also injured in the attack.
Hours later, Punjab Director General of Police (DGP) VK Bhawra informed, "Gangster Goldy Brar has taken responsibility for the murder. Lawrence Bishnoi gang is behind the murder. At least three weapons were used in the murder."
'Indicated Rivalry, But Hasn't Disclosed Motive' Say Cops
As per the the officials, Bishnoi also claimed that Moose Wala was associated with the murder Akali Dal youth leader Vikramjit Singh, also known as Vicky Middukhera in August last year, leading to a “rivalry” between him and the Punjabi singer.
"Bishnoi has not disclosed the exact motive behind executing the killing and has been uncooperative about revealing other details about the murder," the official added.
On Tuesday, the Delhi Police Special Cell took custody of Bishnoi in connection to a different case, under the Arms Act, a day after he was questioned by the police inside Tihar jail over Moose Wala's death.
Bishnoi has been accused of crimes under relevant sections of the Indian Penal Code pertaining to attempt to murder, robbery, assault, and trespassing, among others.
Other questioned so far in the Moose Wala include Gangster Kala Jathedi and his aide Kala Rana, currently in police custody in a different case.
Officials also said that after questioning, Bishnoi was later remanded in three days of police custody by the Patiala high court, for questioning in connection with a case where three criminals were arrested for a brief encounter with the Special Cell’s unit in May.
They added that the arrested criminals had disclosed that the weapons recovered from them were supplied by Bishnoi.
(With inputs from PTI.)