Just before 5pm on a summer evening in Manchester, a white van pulls up outside an address on a residential street.
It's just after a school day and there are children playing on the street as two men in the vehicle, Luke Graham and Anton Verigotta, arrive to deliver drugs at a local crack house.
They are unaware that just moments before three men got out of a stolen car, entered the address and demanded the occupant get them back round.
When Anton gets out and approaches the door, a masked gunman bursts out and shoots repeatedly inside the van.
The balaclava-clad gunman then fires across the street at Anton, grazing his leg, then returns to shoot inside the driver's side of the van - releasing a total of five bullets.
Mortally-wounded Luke is shot through the chest and later dies in hospital despite the best efforts of local people and first responders.
In shocking footage watched by DCI Liz Hopkinson in BBC Two series The Detectives: Fighting Organised Crime, two little girls can be seen running away after the shooting takes place in broad daylight.
Police officers have to get the crowds away as they find live rounds all over the floor.
While witnesses come forward to day they saw three men with balaclavas emerge from the house before the killing took place.
In an unprecedented scene, the programme begins with the murder victim being identified by his father.
Greater Manchester Police’s Major Incident Team (MIT) launches a murder investigation - with the suspects believed to be members of a violent Organised Crime Group.
"Quite often organised crime takes place in the shadows, in the backstreets.," explains DCI Hopkinson.
"But when you see a gunman burst out of a house into a busy residential street and shooting, broad daylight, with people sat in the front garden, children playing, that is horrendous.
"These people are very dangerous individuals and need to be caught."
The major incident team is made up of 150 detectives divided into 10 units, but with the rising concern the shooting could lead to a turf war two units come together to solve the murder.
Alongside DCI Hopkinson, the operation is overseen by DCI Alan Clitherow and the police team meticulously piece together evidence from CCTV and phone records.
They believe the shooting may have been caused by a dispute over drug territory after they began dealing in an area controlled by established gang.
The police receive reports of rumours in the community that local drug dealer Wade Cox is to blame, so he is arrested and brought in for questioning.
He has a tattoo in tribute to notorious killer Dale Creegan, who was sentenced to a whole life order in prison for four counts of homicide involving firearms, including killing two female policer officers.
As the police try to establish who was involved in the shooting, DS Julie Connor of the Major Incident Team tries to track down 'Peanut' - the person whose house the gunman came out of and witnessed the murder.
After visiting around 20 addresses, DS Connor finds Peanut, who explains he was threatened to ring Anton by the three men and heard the gunfire outside his house.
Peanut claims he can't identify the men as they were all wearing balaclavas but DS Connor points out they weren't on the CCTV when they entered the house.
GPS data from Cox's phone suggest he was several miles away from the scene of the murder when it happened, therefore giving him an alibi.
But analysts continue to study CCTV footage of his movements and discover he met a large group of men 90 minutes before the shooting.
The police uncover a large-scale conspiracy suspected to have involved up to 10 members of the OCG.
By cross-referencing GPS data with the CCTV footage they believe they have identified all the men - with the three who went to the shooting site handing over their phones beforehand as part of a plan to mask their movements.
"Handing their phones off to another person is one way of trying to show that they were elsewhere at the time," explains DCI Hopkinson.
With Cox still on remand, warrants are issued for the arrest of eight other men - with three of them captured on a plane getting ready to take off as they attempted to flee the country.
In total, seven men are taken in for questioning over conspiracy to murder and take part in criminal activities.
Over 10 weeks, Cox and the seven other suspected gang members are tried for murder at Manchester Crown court.
Three of the men, Lee Adshead, Frankie Atkinson and Jay Cornforth, are found not guilty.
Jack West, Conor Cornforth and Ben Dodd are found guilty of assisting an offender - with West jailed for 42 months, Cornforth receiving 37 months and Dodd 30 months.
Charlie Atkinson was found guilty of assisting an indictable offence and was sentenced to eight years in prison.
Callum Haplin has fled the UK and remains wanted for conspiracy to murder.
Wade Cox was convicted of murder and grievously bodily harm wth intent and given a custodial sentence of 36 years.
"When he was sentenced the judge took into account all the aspects of that crime," says DCI Hopkinson.
"The fact it occurred in broad daylight, people were in the line of fire, children were playing on the street. And the planning behind that murder.
"The fact as well his allegiances to the likes of Dale Cregan - yeah, I think he deserved it."
It is inherently more dangerous to take on organised crime groups for a police officer and can take years.
Rapidly evolving and increasingly beyond the reach of the law, organised crime groups are operating on an unprecedented scale.
For the first time in this new BBC Two series, a number of specialist detectives tasked with stopping these groups have agreed to be filmed while tracking operations over two years.
*The Detectives: Fighting Organised Crime airs tonight on BBC Two at 9pm
