A migrant followed an asylum worker to a train station before stabbing her 23 times with a screwdriver, a court has heard.
Rhiannon Skye Whyte bled to death after the horror alleged offence at Bescot Stadium train station in Walsall, West Midlands.
The 27-year-old mum had finished a shift at Park Inn by Radisson Hotel, which is where the defendant, Deng Chol Majek, had been staying.
Majek is on trial for murder at Wolverhampton Crown Court which heard the 19-year-old was seen on CCTV following Ms Whyte.
He has denied charges of murder and possessing a screwdriver as an offensive weapon.
She was then heard screaming in a phone call to a friend.
Prosecutor Michelle Heeley KC said he had "followed her down onto the train platform at the Bescot Stadium station".
She added: "Then he attacked her.
Rhiannon Skye Whyte was allegedly stabbed to death at Bescot Stadium station in Walsall
| HANDOUT"Stabbing her over and over again with a screwdriver."
The prosecutor said he "left her bleeding to death" before he returned to the hotel "casually".
"We say you can be sure he is guilty of murder," Ms Heeley said.
Jurors heard the Sudan national got a drink from a shop and allegedly threw Ms Whyte's phone into a river.
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Deng Chol Majek is on trial at Wolverhampton Crown Court over the murder
| PAThe man was later seen "dancing and laughing, clearly excited about what he had done" when he was back at the hotel.
Wolverhampton Crown Court heard the mother had worked at the hotel for about three months, doing jobs like cleaning and serving food.
One of her co-workers noticed Majek "staring at Rhiannon and the woman she was working with" on October 20 last year, according to the prosecutor.
Ms Heeley said: "No one could recall any particular issue that would have caused him to act in that way".
"There had been an issue about some broken biscuits with some of the residents but nothing serious," Ms Heeley said.
"What is clear from the CCTV is that the defendant was hanging around the reception area, staring at Rhiannon throughout the evening."
The prosecutor added that he had changed into a distinctive jacket and sandals before waiting around the reception area where the mother was.
Jurors heard she had left to go home about 11pm when Majek followed her.
Ms Whyte was seen on CCTV calling her friend when Majek was captured two minutes later.
The prosecutor told the court he "closed the gap" before reaching the platform and that was where the alleged attack took place.
Ms Heeley said Majek was "seen running back up the stairs from the platform" and had an object "lit up in his hand" which she claimed was Ms Whyte's phone.
Ms Whyte's friend called police after hearing screams.
The prosecutor said one the train pulled up to the platform the guard "tried to help Rhiannon" but she was "seriously injured and nothing could be done to save her".
"She passed away on October 23, having never regained consciousness," she said.
The trial continues.