In a confrontation over a stolen bike, Brendyn Wade Clark shot a couple seven times with a sawn-off rifle.
Almost four years later, Clark has been found guilty of attempted murder.
However his co-defendant in the Brisbane Supreme Court trial, Mark Troy Duce, has been acquitted.
The June 2019 shooting occurred after Adrian Steven William Hing and his girlfriend Clarice Laura Warren arrived at Clark's home in Brisbane's south to confront him over the bike.
Clark was upset about Ms Warren's new relationship, the jury was told.
Mr Hing had broken off a relationship with Clark's friend to start another with Ms Warren.
In retaliation, Clark and his friend stole Mr Hing's $6000 mountain bike and cut its carbon fibre frame in half.
Mr Hing told the court he wanted "to get the person who cut my bike" and went to Clark's Sunnybank Hills home days later at 7am with Ms Warren and his pit bull Archer.
He said Clark was standing on his front verandah when he started shooting.
Clark continued firing while walking down his front stairs as the couple retreated to a nearby bus stop shelter, the court heard.
Overall, Mr Hing was shot five times and Ms Warren twice.
Clark had to manually work the bolt of his sawn-off .22 calibre rifle to fire each shot, including an unsuccessful close range attempt on Mr Hing, the court heard.
Ms Warren told the jury that a wounded Mr Hing was at one stage on his knees when Clark pointed the gun at her boyfriend's head - then pulled the trigger.
"I heard an empty sound, I saw the trigger being pulled and there was a click," she said.
Mr Hing said Clark aimed the gun at his head but was stopped by a bite from Archer.
Mr Hing was shot in the chest, spine, shoulder, hand and bowels while Ms Warren suffered foot and thigh injuries.
"I tried to throw a punch (at Clark) but did not realise I was shot in the shoulder and the bone was broken," Mr Hing said.
"I was trying to hold onto him but my finger had been shot off and I lost my grip."
Clark lowered his head as family and supporters wept after the jury found him guilty of attempted murder.
They had begun deliberating on Tuesday morning.
Clark had earlier pleaded guilty to malicious act with intent. He will be sentenced by Justice Lincoln Crowley in June.
Meanwhile, Mr Duce was earlier found not guilty.
He was on trial for one count each of accessory after the fact to attempted murder and accessory to unlawfully wounding with intent to cause grievous bodily harm.
Mr Duce was accused of driving Clark three hours north out of Brisbane and hiring a hotel room for him while knowing he had been involved in a shooting.
