McKenna had waited for Sidaway to participate the parkland connected 29 January with her dog, earlier crouching down successful the bushes, acceptable to motorboat his attack.
A assemblage astatine Swansea Crown Court heard McKenna was "angry" aft their narration ended a fewer months earlier, and it was "luck" that she did not die, with her wintertime overgarment helping to prevention her.
During the trial, helium told the assemblage helium had enactment the newest, sharpest weapon from his room successful his container that morning, with the volition of utilizing it to wounded Sidaway.
He said helium wanted to origin Sidaway "serious harm" but not termination her.
"I felt she was reluctant to re-engage with me, and not adjacent accidental hello," helium said.
As she approached, helium stabbed her aggregate times, successful what helium agreed was "a rage of anger".
He told the tribunal helium was "shocked" astatine what helium had done.
"I was aiming for her enarthrosis country and the precocious body. I didn't privation to termination her."
He said the onslaught was interrupted aft Sidaway told him to halt and screamed, and a neighbour shouted.
Neighbour Susan Edwards told the tribunal during the proceedings successful July she heard "high-pitched screaming" and the "bushes shaking" earlier a antheral ran away.
Sidaway phoned for an ambulance and said: "I've been stabbed by my ex-partner... he's been stalking me".
McKenna fled the country pursuing the attack, and said helium dumped his rucksack, with the knife, astatine an allotment adjacent the parkland aft helium ate a yoghurt there.
He past walked to Bronwydd, a colony astir 3 miles (4km) northbound of Carmarthen, on the River Gwili.
"I recovered immoderate shelter, a quiescent woodland distant from the road," helium said.
"I was devastated and kept having flashbacks."
He said helium was determination for 3 nights, earlier helium travelled via taxi and autobus to a infirmary successful Aberystwyth.
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