The man who fired the shot that killed Glenn Walewicz in a case of mistaken identity in 2021 has been jailed for 13 years.

Mr Walewicz, 48, was shot dead as he opened his door to three people in masks who were hoping to steal drugs and money from someone else who lived nearby.

It took police a year to track down those responsible, after a painstaking review of CCTV footage in the area.

In one piece of vision, police saw a car run a red light with its headlights off.

That led to the identification of the driver and later others involved in the crime.

Mr Walewicz was shot in the neck and died shortly after.

The man who eventually pleaded guilty to pulling the trigger cannot be named because he was only 17 at the time of the crime.

The agreed facts state the shooter, 20, and two other males intended to carry out a home invasion, to steal money and drugs but went to the wrong unit.

During a sentencing hearing, the ACT Supreme Court heard the man told a pre-sentence report author that he "loved the feeling crime gave him" and that it made him feel "high on life".

The report showed the shooter had experienced a level of trauma, adversity and instability throughout his life.

It said he first came to the attention of Child and Youth Protection Services in 2007 and there had been a total of 32 Child Concern reports about physical abuse and his exposure to family violence.

His sentence will be suspended after seven years and nine months, meaning he will not be free until 2030.

Another man involved in the crime, Gary Taylor, was sentenced to 10 years and three months, with a non-parole period of five years and six months.

Jayden Williams, who was accused of recruiting the man who fired the shot, was also sentenced last year to two years in jail, which was immediately suspended pending an 18-month good behaviour order.

The driver, Reatile Ncube, was given a two-year suspended sentence by the ACT Supreme Court last year.

Nicole Williams, who was accused of orchestrating the crime, is still to be sentenced after pleading guilty to being an accessory to murder.

She will face court in September.