A dangerous criminal application for armed robber Marcus Denis Mayne is not being pursued after the Director of Public Prosecutions reviewed his prior matters.
But crown prosecutor John Ransom told the Launceston Supreme Court a forensic psychiatrist report revealed a need for a sentence that protected the public.
Mayne was jailed for eight years on Monday after a jury found him guilty of armed robbery in March.
He was cuffed and heavily guarded during sentencing.
The robber yelled profanities as the hearing started and threatened Mr Ransom.
Justice Robert Pearce warned Mayne he would be removed from the court if he didn't settle down and sentencing would go ahead without him.
Mayne agreed to be quiet.
The 31-year-old walked into the ANZ bank at Mowbray in September 2017 and used a knife he hid in a Woolworths bag to threaten a customer and demand money from the teller.
He said to the bank employee: "This is a hold-up. This is a stick-up. Put the money in the bag or she gets it".
The teller and customer who Mayne held-up in the robbery had suffered profoundly and psychologically since the incident, the court heard.
A report completed in July said Mayne didn't suffer from mental illness, had developed an anti-social disorder, had a long history of substance abuse and had little insight into his behaviour.
Despite the "overwhelming evidence" against Mayne, including CCTV footage of the incident, the court heard he continued to deny being responsible for the robbery.
The court heard Mayne rationalised his criminal activity, saying he was in control of his behaviour and would scare people to get their money so he could live day to day.
The court heard Mayne blamed the world at large and the system for his offending.
Defence lawyer Evan Hughes told the court rehabilitation was not lost on Mayne.
Justice Pearce said Mayne's upbringing was characterised by neglect, abuse and exposure to drugs.
The robber had spent much of his life in prison, with Justice Pearce saying his record was shocking and highly relevant.
Justice Pearce said there was a very high risk Mayne would re-offend, with his sentence needing to be about punishment and community safety.
Mayne's sentence was backdated to January 22, 2018. He will be eligible for parole after serving five-and-a-half years.