The defendant in a Launceston murder trial has admitted ``jabbing'' a knife at the man's he's accused of killing.
Taking the stand today Michael Vernon Lowe, of Waverley, said he only wielded the knife after he was attacked by Darren Booth.
Mr Booth was pronounced dead on May 13, 2012, at the home of his girlfriend Crystal Wells, who was going through a separation with Mr Lowe.
He died from heavy blood loss resulting from a cut vein after being stabbed three times in the chest.
In Launceston's Supreme Court Mr Lowe said he used the knife to defend himself after going to Ms Wells's home at Kings Meadows and finding Mr Booth there.
The 52-year-old said Mr Booth struck him over the head with a cricket stump.
``I was jabbing the knife at him to keep him away from me,'' Mr Lowe said.
``I thought I'm not going to make it out of here, I'm going to die here.''
``That was the belief in your mind?'' Defence Counsel Greg Richardson asked.
``Yes,'' he said.
But crown prosecutor Linda Mason accused Mr Lowe of being so outraged at infidelity he attacked Mr Booth. ``You must have realised at that point in time ... she was cheating on you,'' she said.
``No,'' Mr Lowe said.
``You then produced your knife and attacked him,'' she said.
``No I didn't,'' Mr Lowe said.
The trial continues today.