Police say they are treating the death of a 48-year-old man, whose body was found in a flat in Newport, as murder.
Richard Glyn Carslake, 48, was found dead in the flat on Jeddo Street, Pill, at 0915 BST on Wednesday.
A post mortem examination indicated he died as a result of pressure to the neck and face, said police.
A 20-year-old man from Pontypool, Torfaen, has been arrested on suspicion of murder and is in police custody.
Det Ch Insp Ian Roberts, who is leading the investigation, said: "Our thoughts remain with Richard's family, and police family liaison officers are supporting them at this extremely difficult time.
"We are continuing to follow a number of lines of inquiry in and around Pill and Newport city centre, and are still very interested in speaking to anyone who may have seen Richard on or since March 29th."
Supt Dave Johnson added: "We have neighbourhood officers in and around the area who are available to speak to anyone who has any information or concerns about this incident."
Anyone with information is asked to contact Gwent Police on 101 or independent charity Crimestoppers anonymously on 0800 555111.