Kyle Knowles, aged 32, of Staunton Drive, Sherwood, was fatally stabbed on a tram approaching Highbury Vale tram stop at around 11.10am on Monday 26 June.
A 24-year-old man was arrested immediately after the incident.
He was taken to hospital after suffering injuries to his hands but was later discharged.
He has since been recalled to prison and is on police bail while detectives continue to investigate the circumstances around Mr Knowles death.
Detective Chief Inspector Clare Dean, who is leading the investigation, said: “A dedicated team of detectives are continuing to work extremely hard on this investigation and are building up a picture of what happened on the morning of 26 June.
“Our thoughts remain with the families and friends of Mr Knowles and all those affected by this incident. We will continue to provide support and reassurance.
“We would also ask people to respect the families’ wishes for privacy at this difficult time to allow them to grieve.
“As always, we will provide the public with updates as the investigation progresses.”
Anyone with information, or anyone who has any mobile phone footage or was in the area at the time is asked to either call 101, quoting incident number 274 of 26 June 2023, or contact Crimestoppers anonymously on 0800 555 111.
Members of the public with information can also submit this through the Major Incident Public Portal: https:///mipp.police.uk/operation/33EM23E51-PO1
Notts Victim CARE is available to anyone who has been directly or indirectly affected by the incident and is a free system for anybody to use.
You can contact 0800 304 7575 or visit https:///crowd.in/5aEkrw
The helpline is open Monday to Friday 8am to 8pm and Saturday from 9am until 5pm.
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