Mystery shrouds the death of Bahujan Samaj Party's former MLA Haji Aleem, whose body was found lying at his Bulandshahr residence on Wednesday morning.
A pistol was also recovered from the spot leading the police to suspect it to be a case of suicide.
The body was sent for autopsy and a thorough probe was underway.
The police were also looking into the killing of Rehana, Aleem's second wife, who was allegedly murdered by two of her stepsons in New Delhi three years back.
Haji Aleem, who had several criminal cases registered against him, was found dead a day after the death anniversary of his second wife, who was murdered in New Delhi three years back.
Sources said that the family members, who prayed on Rehana's death anniversary on Tuesday, were shocked to find the body of Haji Aleem lying in a pool of blood in his room in Uppercoat area of Bulandshahr on Wednesday morning.
The deceased had bullet injuries and a pistol was found lying nearby.
The family suspects it to be a case of murder but the police are of the view that it is a case of suicide.
Forensic experts were called to collect scientific evidence from the scene of crime that could lead to the sequence of events before the killing.
The police also suspects some foul play as three years back, Aleem's second wife Rehana (40) was found dead at her New Jafrabad residence in Delhi on October 9, 2015.
Aleem had gone for Haj pilgrimage at that time.
The New Delhi police later claimed that Rehana was murdered by Aleem's sons from his first wife -- Danish and Anas.
The cops said that duo were helped by their driver Nadeem, who was arrested from Ghaziabad three days after the killing.
The Delhi police also said that Rehana was murdered over a intra-family property dispute.
Rehana's autopsy showed 11 stab and two gunshot wounds.
Rehana married Aleem in 1990 but the couple did not have any issue.