A man left a woman scared and helpless as he followed her around a supermarket for 20 minutes and touched her bottom three times.
The incident happened at the Tesco Extra store in Carmarthen.
Martin Rhys Roberts, of Trevaughan, followed several women around the store before he targeted a student.
Roberts, aged 30, followed her around the aisles of the supermarket after she had tried to walk away from him. When she realised that Roberts had not touched her accidentally, she text a friend who was waiting outside.
Anxious to leave the store, she did so without reporting the incident, which happened in May.
However, a security guard working at Tesco alerted police after he himself became suspicious of Roberts’ behaviour. He described how he had seen a man running into the store before walking out in a casual manner without buying anything.
Watching back footage captured by the in-store CCTV system, the security guard was able to see Roberts follow several women around the supermarket.
An investigation was then launched involving Dyfed-Powys Police officers from Carmarthen, who conducted local patrols, a technical support unit who helped to identify the suspect with the use of CCTV, and the force’s Economic Crime Team.
This led to Roberts being arrested on suspicion of sexual assault.
Detective Sergeant Melanie Havard said: “Thanks to the work of the investigating officer, Offender Management Unit and Economic Crime Team, we were able to trace the victim through enquiries linked to the bank card she used in store,”
“When we spoke to her, she gave an account that mirrored the actions captured on CCTV. While at the time she did not report the incident, she fully supported our investigation as she had been affected by what had happened.
“With the victim’s statement, CCTV footage and significant comments made by the defendant, we secured a charge of sexual assault against Roberts.”
Roberts appeared at Swansea Magistrates’ Court on Friday, September 4.
He was found to be in breach of a sexual harm prevention order previously imposed and was sentenced to 28 weeks in prison.
Dyfed-Powys Police has not released a custody photograph of Roberts.