Brutal killers Kenneth Burgess and Dennis Robinson have been found guilty of murdering the Cooper twins in a sickening baseball bat attack.

A jury took just under seven hours to convict the pair for the savage ?vigilante? assault that sent blood spraying onto walls of Burgess? apartment, leaving the young brothers with horrific injuries that probably ended their lives in minutes.

Amid chaotic and dramatic scenes last night, the twins? mother, Rochelle Cooper, collapsed in the Bermuda Supreme Court and was carried out into a waiting ambulance minutes before the verdicts were delivered.

Burgess, who launched the fatal beating in a revenge attack because he thought the twins had robbed his father, was unanimously convicted of murdering Jahmal and Jahmil Cooper.

Accomplice Robinson, who helped dump the brothers? bodies 80 feet down Abbot?s Cliff, was convicted on a 11-1 decision also for murder. The pair now face the prospect of double life terms when they re-appear in court this morning for sentencing.

The verdicts, which came in just before 6 p.m. last night bringing to an end one of the worst crimes in Bermuda?s history, were greeted with jubilation by family and friends of the 20-year-old twins.

The twins? sister, Tameya Davis, raced out of court and yelled: ?They?re f**king guilty, they?re both f**king guilty ? and I am happy about it.?

?Justice has been done,? she later told as she left Supreme Court One. ?I want them both to get life.?

She told how a shaking Rochelle Cooper was dramatically raced to hospital ? and revealed her mother had no idea the twins? killers had been caged.

?It?s been a stressful and hectic time for everyone in my family,? she said. ?My mother was rushed to hospital because she collapsed before the verdict was read.

?Her nerves were shot and we haven?t been able to reach her yet. She doesn?t even know. But when she hears this news she?ll be fine. We?re trying to get hold of her right now.?

Ms Davis said she was certain justice had been done and added: ?I am going everywhere shouting ?guilty? so everyone will know.?

Friends surrounded Ms Davis, and most were jumping and screaming for joy. They said the past year has been ?hell? for everyone.

Doreen Wade, the Cooper twins? aunt, said although she was ?overjoyed? by the verdict, she did feel remorse amid such tragic circumstances. ?I do feel that justice was done.? she said. ?It had to be done.

?But I do feel bad for the Burgess and Robinson families because this has been hard on them too. Those two (the defendants) have messed up everyone?s families.

?Everyone is feeling pain tonight.?

Ms Davis also praised the work of the Department of Public Prosecutions, who had been under pressure to secure convictions in the wake of high-profile failures like the Rebecca Middleton case.

?I can?t thank them enough,? she added, referring to the Crown team of Paula Tyndale and Cindy Clarke, who went up against London-based QCs Courtenay Griffiths and John Perry in the four-week murder trial.

Most of the defendants? family and relatives left the court without commenting, but a relative of Robinson said: ?He?s not guilty. He never touched anyone. He never hurt anyone.

?The evidence speaks for itself. This is not justice.?

Double murderers Burgess and Robinson last night showed little emotion as the verdicts were announced in a tense and almost completely silent courtroom.

Flanked by Police officers in stab-proof vests, Burgess and Robinson were then led down the steps of Supreme Court One to Bermuda high security Westgate Corrections Facility ? and may now spend most of the rest of their lives behind bars.

The verdicts come after a high-profile trial in which the jury heard how the murderers ? friends who met at university some ten years ago ? drove the twins from Burgess? Elliott Street gambling den to his ground floor apartment at Crown Hill Lane, Devonshire, last March.

Once inside the flat, Burgess pulled out an aluminium baseball bat and used it to attack the brothers with such force that Jahmal?s jawbone was completely smashed in two. Jahmil was struck so hard on the back of his neck, the trial heard, that he too may only have survived a matter of minutes after the fractures were inflicted.

A terrified eyewitness who watched the attack unfold said he heard a ?tinging? sound as Burgess lashed out and rained down blows with the metal weapon.

Prosecutors said that after the attack Robinson, who guarded the door while the assault took place and knew of Burgess? plan to murder, drove to Abbot?s Cliff to dispose of the bodies.

After a massive Police search the twins? skeletal, decomposing remains were found ? one month after their lives were violently ended at Crown Hill Lane.

Blood stains were cleaned from the walls of the crime scene, which was targetted by arsonists during the early stages of the investigation.

But forensic officers were able to spot tiny specks of Jahmal?s blood. As a result, vital DNA evidence could help nail Burgess, who tests revealed also had small spots of Jahmal?s blood in links in his watch strap .

A small smear of Jahmal?s blood was also found hidden on the inside door of Robinson?s van. And the jury agreed with prosecutors that this must have got there when the bodies were taken to be dumped at Abbot?s Cliff, a fateful journey critically captured by CCTV cameras in Flatts in the early hours of March 13.