Detectives probing the death of teacher Lewis Siddall spoke to more than 60 people outside the bar he was assaulted in as part of a bid to trace witnesses.
Police officers thanked the public for their help following the appeal outside the VDKA bar on Silver Street, Doncaster- one week after Lewis’ death.
Detectives said they are now following a number of positive lines of enquiry and examining CCTV footage from the bar.
But officers are continuing to appeal for people who may have witnessed the incident to come forward.
A murder investigation was launched after Mr Siddall, 24, was found dead at his home in Skellow, Doncaster, on Friday 14 August, after he was allegedly assaulted at the bar at around 11pm the night before.
Detective Chief Inspector Steve Handley, who is leading the investigation, said: “At this stage one of our key aims is to identify and speak to potential witnesses to establish the full circumstances that led to Lewis’ untimely death a week ago.
“I know how popular Lewis was as a teacher and the response we’ve had from the public has been very encouraging with officers speaking to over 60 people last night.
“We are following a number of positive lines of enquiry and we are continuing our work in terms of examining a significant amount of CCTV footage from the VDKA bar and the surrounding area.
“My main priority is to provide Lewis’ family with the answers they need and deserve in terms of what happened to him when he went out last Thursday evening before returning home with significant head injury, which sadly proved to be fatal.
“I would continue to ask anyone who was in the VDKA bar or the area of Silver Street last Thursday around 11pm and may have witnessed what happened to come forward. You may have information that is pivotal to this investigation.”
A 22-year-old man was arrested on suspicion of murder and has been released on bail pending further enquiries.
Were you at the bar between 11pm and 11.30pm on Thursday 13 August?
Anyone with information should contact South Yorkshire Police on 101, quoting incident 122 of 14 August 2015.
Alternatively, call Crimestoppers anonymously on 0800 555 111.