| Agencyname: | South Wales Joint Scientific Investigation Unit |
| Nativename: | Uned Ymchwilio Gwyddonol ar y Cyd |
| Formedyear: | 2012 |
| Country: | United Kingdom |
| Countryabbr: | UK |
| Divtype: | Police area |
| Divname: | Bridgend, Cardiff, Merthyr Tydfil, Neath Port Talbot, Rhondda Cynon Taf, Swansea and Vale of Glamorgan unitary authority areas |
| Map: | File:WalesPolice.png |
| Sizearea: | 2,074 km² |
| Headquarters: | Bridgend |
| Website: | www.south-wales.police.uk |
The South Wales Joint Scientific Investigation Unit (Welsh: Uned Ymchwilio Gwyddonol ar y Cyd De Cymru) is a specialist forensic police unit established in April 2012.[1] It specialises in analysis of drugs, glass, fingerprints, digital crime scenes, ballistics, trace evidence, and forensic samples.[1]
The SWJSIU is based in Bridgend.[2] It is funded by and serves South Wales Police and Gwent Police, independent from the Forensic Science Service of England and Wales.[3]
The unit is the only one of its kind in the UK able to undertake glass investigation, which will involve examining fragments of smashed glass for forensic evidence,[1] and exports copies to the UK National DNA Database. It is also one of only three to have a "metal vacuum deposition room", to obtain fingerprints from smooth surfaces such as carrier bags and glass.
The SWJSIU was launched after the closure of the nearby government-owned Forensic Science Service (FSS) regional laboratory in Chepstow.
The department is a Centre of Excellence and is obtaining ISO accreditation.