Police have issued an appeal to trace a man they believe has information about a fatal stabbing outside a supermarket.
Five teenagers have been charged with murdering Ian Kirwan who was killed at an Asda store in Redditch on 8 March.
West Mercia Police has released images of a man who was seen on CCTV travelling by train from Redditch towards Longbridge around the time of the attack on the 53-year-old.
The force described him as white with short, dark hair.
Police said he was wearing a grey hoody, a black, puffa-style gilet, black jogging trousers and trainers at the time, while carrying a black rucksack.
Detectives appealed for anyone who recognises the man or has information to get in touch.
Paying tribute in March, Mr Kirwan's family said the software engineer, who was stabbed in Jinnah Road, was the "warmest, kindest man who was always there for anybody in need".
Follow BBC West Midlands on Facebook, Twitter and Instagram. Send your story ideas to: newsonline.westmidlands@bbc.co.uk
Three boys charged with murder after Asda killing
Summer socialising in Herefordshire adds to noise complaints
Fascinating stories detail South Asian community's development in city
Blaze at Hartlebury Common was started 'deliberately' firefighters believe
Shouting, bullying, rude emails: Herefordshire councillors reprimanded
Bromsgrove nightclub's licence reviewed after continuous “horrific" crime
Sadness as well-loved Bromsgrove pub set to close
Novelist Salman Rushdie in surgery after on-stage stabbing
Man arrested after Salman Rushdie attacked on stage
Salman Rushdie: The writer who emerged from hiding
Why S Korea just pardoned the Samsung 'prince'
The mystery deaths of two Saudi sisters in Sydney
The librarian who defied the Taliban
Why Hong Kong is seeking solace in local pop
New Netflix dark comedy turns tables on wife beaters
Why Sir Ganga Ram's legacy lives on in India and Pakistan
'I'm a different person after having monkeypox'
Fear in the only EU country where abortion is illegal
High and low-tech ways to tackle India's water crisis
The best public pools around the world
Why open relationships are on the rise
The ejector seats that fire through the floor
© 2022 BBC. The BBC is not responsible for the content of external sites. Read about our approach to external linking.