Carl Wayne Bowen admits stabbing Jamie Yeates but denies his murder
Two women who had relationships with a man who admits stabbing his stepson to death have told a jury about the violence they suffered at his hands.
Carl Wayne Bowen, 42, of Llanelli, admits killing Jamie Yeates, 15, but denies murder at Swansea Crown Court on grounds of diminished responsibility.
Emily Jane Lewis said during her eight years as Mr Bowen's partner he once chased her with a kitchen knife.
Lisa Williams said Mr Bowen had confronted her while holding a hammer.
Mr Bowen is accused of murdering stepson Jamie Yeates and the attempted murder of Jamie's sister Kimberley and their mother Maria.
He denies murder, and two charges of attempted murder, as well as lesser alternative charges relating to his stepdaughter and wife.
Jamie, a promising jockey, was stabbed to death at the family home in Llanelli on 8 January this year.
The trial has heard the defendant does not deny stabbing Jamie 18 times but told police he was so jealous of the teenager that he believed it amounted to an "abnormality of mind".
Elwen Evans QC, prosecuting, told the jury at the start of the trial that Mr Bowen was so jealous and possessive he could not even stand Jamie and his sister visiting their own grandparents.
On Thursday, two former partners of Mr Bowen described how he behaved towards them.
Emily Jane Lewis said Mr Bowen had been so possessive she had to look at the ground whenever she was with him otherwise he would accuse her of looking at other men.
She said he controlled "the way I dressed, where I went, who I spoke to, everything".
Miss Lewis, a care worker, said she was in a "violent" relationship with Mr Bowen for eight years, during which time he punched her, kicked her and pulled her hair.
On one occasion he chased her upstairs while holding a "large kitchen knife".
She said she locked herself in a bathroom but Mr Bowen plunged the knife through the door.
Lisa Williams, a shop supervisor, who was Mr Bowen's girlfriend for six years, said the defendant had been so possessive he examined receipts after she had been shopping to check she had told him the truth about where she had been.
She said she once returned home to be confronted by Mr Bowen holding a hammer.
Unknown to Mr Bowen, she said, her father was with her and, on seeing him, Mr Bowen put the hammer down, she said.
"It just missed my face," she added.
It is alleged Mr Bowen burst in on Jamie as he slept and stabbed him 18 times with a kitchen knife.
The blows severed his spine and several ribs, the court has been told.
Mr Bowen lived in a small terraced home with his stepson and daughter and seven younger boys he had had with his wife, Maria.
The trial continues.