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Detectives have offered £10,000 to solve the suspicious death of a Polish man now being treated as a murder "hit" linked to organised crime.

Piotr Woroneicki, 32, was found unresponsive in the street in November last year, with police originally treating it as "unexplained". But a special post-mortem later revealed Piotr, who was dead for several hours before his discovery, was likely killed by compression to the neck.