The list below details the police probes currently under way.
5. ALENA
Alena Grlakova, aged 38, was found on land behind the Fitzwilliam Arms Hotel, Parkgate, on Monday, April 8 after disappearing on Boxing Day last year. An arrest has been made but nobody has been charged. D | Other 3rd Party Photo: JPI Media
6. MARTIN RIGG
Martin Rigg, aged 37, died after being struck by a tram in West Street, Sheffield city centre, in May following an altercation close to Convent Walk. Two arrests have been made but nobody has been charged. | Other 3rd Party Photo: JPI Media
7. UNNAMED BABY
A murder investigation was launched following the death of a nine-week old baby boy who suffered a cardiac arrest in Great Houghton, Barnsley, in November. A 29-year-old man was arrested and later bailed. Tests are still being carried out. | Other 3rd Party Photo: JPI Media
8. JOHN METHLEY
John Methley, aged 39, died after an attack close to the Midland Road roundabout, Masbrough, Rotherham, in February. Two men have been charged with murder. | Other 3rd Party Photo: JPI Media