A man has been arrested on suspicion of murder, as police want to speak to anyone who saw an individual dressed all in black, wearing a balaclava, near the scene of the attack.
On Sunday 7 July, police arrested a 30-year-old man in Longsight, Manchester.
He was taken into custody ahead of questioning.
This came almost one week after emergency services found the body of Fintan McDwyer at a property in Fallowfield, Manchester, on the morning of Monday 1 July.
Mr McDwyer’s family described him as a “gentle giant” and a “true gentleman” with a “wonderful sense of humour”.
Paying tribute to him, they said: “Fintan was our own gentle giant, with a calm and reassuring presence.
“He had the most wonderful, soft, Irish lilt.
“He was a true gentleman, had a wonderful sense of humour, and always had a twinkle in his eye.
“There isn’t anyone who would say a bad word about Fintan, and it breaks our hearts that he has been denied years to be with his sons and grandchildren.”
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Officers believe the “violent assault” took place at the property and Mr McDwyer suffered fatal injuries caused by a “sharp instrument”, Greater Manchester Police said.
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Police also want to speak to any members of the public who may have seen a man walking around the area of Platt Fields Park, Fallowfield, Birchfields Park, and Rusholme around 4-4.30am, dressed in all black clothing with a balaclava on.
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Detective Inspector Lee Shaw said: “This is a shocking murder of a much-loved family man.
“As the investigation progresses at pace, we have specially trained officers who have been deployed to support them and keep them updated throughout the investigation.”