Mr Bulpin, 65, from Fairwater, Cardiff, was found on the path alongside the rugby club at around 3am on Monday, March 18.
A post-mortem has been conducted and further examinations are now on-going to establish the cause of death.
Detective Inspector Bob Chambers, from South Wales Police, said “Initial investigations have so far not revealed or confirmed any obvious cause of death, however extensive enquiries are continuing to establish the cause and circumstances of Mr Bulpin’s death.
“I would like to thank members of the public who responded to our appeal for information by coming forward with information and sightings which have helped enormously.
“Police cordons have now been lifted and we thank the community for their support and understanding while enquiries were being conducted in this area.”
Mr Bulpin’s family continue to be updated on the investigation.
Anyone who may have seen or had contact with Stephen between 4pm on Sunday, March 17 and 3am on Monday, March 18, is asked to please come forward.
Detectives are particularly keen to speak to anyone who may have seen or had contact with Stephen at Cathedral Close during the early hours of Monday, March 18.
If you can help, please contact South Wales Police by one of the following means quoting 2400089199.
🗪 Live Chat https://www.south-wales.police.uk/
💻 Contact us via https://bit.ly/SWPProvideInfo
📧 Email swp101@south-wales.police.uk
📞 101
Always call 999 in an emergency.
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