Detectives believe and left to die in a run down housing project known for drug dealing and gang activity.
One theory being investigated is that they accepted a lift back to their rented condominium in the fashionable tourist resort of Longboat Key after spending the night bar hopping.
But instead, they were driven to the low income housing project where they were ambushed by at least one armed teenager.
Police sources said both men had been running away when they were gunned down. Their bodies were found 50 feet apart.
They were still in possession of cash, and police did not find any evidence to suggest they had been wanting to buy drugs.
Local residents living near the crime scene said they had been told the two former University of Sheffield students were ambushed by masked men who attempted to rob them.
Sonja Seymour, 31, who lives on the street, said:” I heard that when they arrived here there were already some people waiting for them. They were wearing masks.
“The men ran away and they were shot. I saw one of them lying in the street on his back with his arms outstretched. The other was across the road and lying in his back.
“They were not moving. The ambulance arrived and tried to work on the two men, but they could not do anything. They were covered up and taken away and the police put up all yellow tape.”
A police source said: ”It is entirely plausible that they were taken to this location where they were confronted by at least one individual. We are still trying to determine why they would want to be in this area at that time of night. We know they did not have their own transport so they were brought to this location. Someone could have called ahead and people were waiting for them
"It was late at night and the would not have known what this area was like."
The bodies of Cooper and Kouzaris were found in an area known as Newtown in the north of Sarasota.
A 16-year-old boy has been charged with the double murder.
Police sources revealed he had been arrested for a violent gun offence just over two weeks ago when shots were fired in an attempted robbery.
The teenager was charged with aggravated assault with a deadly weapon but released by a court while police carried out further inquiries.
As it was his first offence the boy, who has just turned 16, was released but police said they had been planning to pursue the case.
The alleged killer’s name has not been released but he lives with his mother in the housing project block where both men were killed.
Police said he will be charged as an adult which could lead to the death penalty if convicted of first degree murder.
The parents of Mr Cooper, a former child tennis star, were said by a family friend to be “too distraught” to speak about their only son’s death.
Speaking outside the rented condominium building a family friend said: ”They are both hysterical and are still just coming to terms with what has happened.
“It is like a very bad film, a complete nightmare.”
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James Cooper, 25, and James Kouzaris, 24, were attempting to flee when they were shot multiple times and left to die in a run down housing project known for drug dealing and gang activity
In 24, In 25, In and James Kouzaris, In James Cooper, In were attempting to flee when they were shot multiple timesMonday, 18 April 2011
Gang members found guilty in Juarez murders
In Gang members found guilty in Juarez murdersThursday, 14 April 2011
A pair of imprisoned gang members has been found guilty of murdering two brothers who were gunned down more than a decade ago while visiting their cousin's clothing store on Lincoln Boulevard.
The verdict was read Tuesday in the murder trial of David Robles and Jessie Garcia, cousins affiliated with local street gangs and the Mexican mafia who law enforcement officials said were out to settle a dispute over drugs and money when they and two other suspects drove to the Westside Clothing store on Oct. 27, 1998 and shot and killed Michael Juarez, 27, and Anthony Juarez, 19, and wounded two others.
The shooting raised alarm in Santa Monica because of the extreme nature of the crime. The Juarez brothers, who were visiting from out of town, and the two who were wounded were described by police as innocent victims who had no ties to gangs.
"We've been waiting for this day for a long time," said Francisco Juarez, the victims' uncle. "Justice has finally been served and now we're hoping this brings some closure."
The defendants were convicted on two counts of murder and two counts of attempted murder. Robles is scheduled to be sentenced on May 3. Garcia is expected to return to court on May 19. Both could receive life in prison.
For Ginger Blackstone, the mother of Anthony Juarez, the verdict was welcomed but it has done little to ease the family's pain. She and her ex-husband, Bill Juarez, Anthony and Michael's father, recently had to bury their daughter, who they said fell into a deep depression following her brothers' murder and committed suicide.
The family also had to endure a mistrial in 2009 when a jury failed to reach a verdict.
"We were extremely frustrated [after the first trial], but we are so grateful this time around," she said. "We thought the prosecution did an excellent job. It was tough to sit through it again and see those crime scene and autopsy photos. And even though I'm still dying inside at least we were able to get justice for our boys, something we've been fighting for for years."
Fighting through tears, Bill Juarez said he was extremely grateful for the work of Santa Monica detectives as well as the kindness and support given to the family from various sources over the past 11 years.
SMPD Detective Michael Bambrick, who took over the case in December 2004 after the previous lead detective retired, said eye witness testimony along with DNA evidence collected from a ski mask left at the scene of the murders were key pieces in the prosecution's case the second time around.
He said police initially believed the murders were in retaliation for an earlier shooting involving a gang member, however, further investigation led detectives to believe a dispute over drugs and money fueled the hit. The suspected target was not at the clothing store the day of the shooting, Bambrick said.
"It could have been they were trying to send a message," he said of the shooters.
Three men wearing masks entered the clothing store shortly before noon, opened fire and ran out. Bambrick said Robles acted as the getaway driver and was positively identified by witnesses. Garcia dropped his mask in the store and was also identified by witnesses.
Using DNA evidence collected from the mask, Bambrick said detectives were able to link Garcia and Robles, who were roommates at the time, to the crime scene. The two other shooters were never identified. Bambrick continues to investigate in hopes of locating the suspects.
"We're still working it, but there's not a ton of information out there," he said, urging anyone who may have knowledge about the shooting to come forward.
As for the Juarez family, Blackstone said she is looking forward to sentencing when she will be able to speak directly to the defendants and tell them how their actions have hurt the family. She hopes Robles and Garcia spend the rest of their lives behind bars so they suffer for their crimes.
At the time that murder charges were filed, Robles, also known as "Puppet," was serving an eight-year sentence in Corcoran State Prison. He was convicted of voluntary manslaughter in February 2001. Garcia, also known as "Psycho," was convicted of carjacking and assault with a deadly weapon with a firearm causing great bodily injury in May 1999. He was serving a 15-year sentence.