David Cerven was "distraught" after the recent break-up of a two-year relationship with his Slovakian girlfriend, according to a former workmate.
The former workmate, who wished to remain annonymous, also said the 21-year-old claimed he needed money to repay a loan for surgery on a knee injury he sustained asa sniper in Iraq.
"He was distraught about his life, he said it was hell, but he seemed like a 'get up and keep going' kind of guy."
He said he worked alongside Cerven, who was shot dead by police in Myers Park in central Auckland on Sunday night, for two weeks.
"He had seen a lot of pain and suffering, but he was a good person, he knew right from wrong, and would talk quite passionately about relationships and love."
"He said he loved this country so much, because it was so nice and peaceful.
"He was a hard worker - he came to the company with no experience, and got given labouring work. It was a tough job, but he didn't complain.
"There's no excuse for what he went and did, but let's see him as a man that was on the edge after a hard life."
Another former colleague, who also wished not to be named, said Cerven's loan for his surgery came from his mother, and he was set on paying her back.
"He was telling us he was going to go back to fight in the US Army. That was part of his long-term plan. We tried to talk him out of it."
The colleague said he had no reason to disbelief Cerven's claim that he had been in the US Army.
He said Cerven spoke of the likelihood of being killed once he enlisted. He believed his death in Myers Park was "very deliberate" and would have been planned for months.
"He knew what he was up to. He was set on dying. But we never thought he was going to do it this way.
"I told him to his face that he was messed up and that he needed to sort his shit out - that there was plenty of other options to get money.
"I said, 'have you asked your mum whether she wants her son, or her loan paid?' But he was set on not giving her the option."
Cerven became close friends with Ms Safronova and her boyfriend - also a fighter - and she said the pair talked on Skype all the time after he left Canada.
"He didn't have a lot of money, but he was such a nice guy, he would never ask for anything," she said.
That meant the group of friends spent much of the summer having barbeques at the beach and cooking dinner at home.
"It was a very happy time for him," Ms Safronova said.
"He trained a lot. His English was really bad, but that didn't put him off always wanting to get to know Canadian girls.
"We would always teach him words - my favourite one was how he pronounced 'avesum' instead of 'awesome'."
Ms Safronova said Cerven loved playing with his host family's two small dogs.
"He would always take them out for a walk and send us pictures ... he called them 'my chihuahuas'."
She said his family in Slovakia was poor and a lot of the motivation behind his hard work training as a fighter was so that he could help his mother out financially. He never told her about any problems or depression.
Ms Safronova said Cerven returned to Slovakia about September 2012, and she hadn't spoken to him for two years. She was unaware of any plans he had to move to either the US or to New Zealand.
"The reason I'm here today and the reason I'm here with my colleagues is to bless the scene and think about the...tragic death of David.
"We acknowledge David, we acknowledge his family, we acknowledge this place as the location where he lost his life."
Mr Chambers said the cordoned-off area of the park would be reopened soon, as the police investigation wraps up.
Police could not give an update about the investigation at this stage, he said.
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