Idaho's new $1.2m execution chamber where volunteers will shoot eight death row inmates - here are the latest gory details

Idaho lawmakers have released harrowing new details surrounding a state-of-the-art firing squad chamber, where a group of volunteers will soon execute eight death row inmates.

The state became the first to adopt the controversial method on 1 July after issues were raised regarding the previous technique of lethal injection.

The Idaho Maximum Security Institution, located approximately 15 miles south of the city of Boise, currently houses a number of notorious killers. Amongst the facility's inmates are Bryan Kohberger, nicknamed the 'University of Idaho Killer', as well as 'Doomsday Mom', Lori Vallow Daybell.

Though the pair avoided a death sentence for their heinous crimes, Daybell's husband Chad was handed capital punishment in 2019 for his role in their string of cult-related murders, including her two teenage children.

Chad Daybell will be executed in the coming years (KMTV/Idaho Maximum Security Institution)

Chad, one female inmate, and just six other male residents will be executed in the coming years.

Ahead of this, Gem State officials are currently on the hunt to employ six law enforcement volunteers, all of whom have proven accurate aim, to fire the weapons used in the brutal new execution method.

Three will be responsible for firing the initial single .308-calibre bullets through a foot-wide opening in a protective wall 10 yards ahead of the inmate, while a further two stand by as alternates.

The latter two will release a second round of bullets using semi-automatic rifles if the inmate survives the first volley.

The sixth hire will take on the role of the squad's leader.

Each inmate will wear a target on their chest (Getty Stock Images)

It'll be their job to ensure the state-owned firearms are loaded and ready ahead of time, and to direct the execution on the day.

Each volunteer will need three years of Peace Officer Standards and Training certifications in order to qualify, as well as a near-perfect aim.

During the vetting process, candidates will be required to repeatedly shoot at a heart-sized target with precision, and take part in live execution rehearsals.

Their identities will also be kept confidential under state law.

Candidates with a history of firearm misconduct, or a relationship to any imprisoned inmate, their family or their victims, will not be permitted to apply.

The killing itself will take place inside an execution chamber that has set the state of Idaho back a staggering $1.2 million.

One day and one hour beforehand, inmates will be offered sedatives that'll calm them prior to any bullets being fired.

Idaho is one of only a few states to allow execution by firing squad, and is the only one to have it as the primary method (Tyla/Getty Stock Images)

On the day of their execution, they'll be strapped into a chair that's been specifically designed to constrain their movements, as well as a heart monitor that'll determine when they've passed away.

A target will also be placed above their hearts, so as to provide the six new gun-firers with somewhere to aim towards, and they'll be granted permission to use an eye-mask before being shot.

The prison's director will read their death warrant immediately before the weapons are discharged, giving the inmate a final opportunity to issue a statement to their or their victims' families.