One of the Cooper twins? DNA was found in blood taken from the scene where the brothers allegedly suffered a violent baseball bat attack, a court heard.

The DNA of Jahmal Cooper matched a sample taken from a concrete patio outside the Crown Hill Lane ground floor flat where prosecutors claim defendant Kenneth Burgess launched the vicious assault.

Forensic biologist Sobia Malik (pictured) also told the court Jahmal?s DNA matched blood removed from the inside back area of a Fubu sports shirt, seized by Police during a search of an upper apartment at Crown Hill Lane.

The Canada-based scientist told the jury that skin cell tests on who had worn this shirt also revealed Burgess? DNA on the inside collar. This would not have been caused by ?casual contact? with the shirt, the court heard.

Ms Malik also said Jahmal?s DNA ? the body?s unique genetic ?fingerprint? ? was found on a step-ladder discovered inside the lower apartment at Crown Hill Lane, Devonshire after the alleged attack. Blood was also on bathroom tiles and a window pane inside the flat, she added.

The 20-year-old?s DNA was found on a watch taken from Burgess after he was arrested in connection with the twins? disappearance, and also on a blood stain found on the inside door of a white van the prosecution claim co-accused Dennis Alma Robinson used to drive Jahmal to the Crown Hill Lane property before the alleged attack.

She told the court that, in all cases apart from the white van blood stain, the chance of the DNA profiles being anyone other than Jahmal was one in 1.4 trillion. The probability of the white van profile being anybody else was one in six billion, she added.

The DNA profile of Jahmal was built up using his toothbrush and a leg hair. Ms Malik said no DNA profile of Jahmil could be developed from the evidence provided.

Blood stain samples taken from the defendants were also used during the tests and DNA profiles could be built up of both Burgess and Robinson.

Ms Malik said Jahmal?s DNA matched blood located on the top and bottom of a Tissot watch seized from Burgess after he was arrested. The bottom of the watch included a mixture of DNA, with the major component Jahmal?s and the minor component Burgess?.

Jahmal?s DNA also matched five blood samples found on stepladders recovered from the Crown Hill Lane lower apartment. And the probability of that profile being somebody else ranged from between one in 1.4 trillion to one in six billion.

Blood was found on a table and mallet from the same flat, but there was not enough DNA to continue with tests.

Courtenay Griffiths QC, for Burgess, said the scientist had used a population database using information from Ontario, Canada, when working out the probabilities of DNA matches. He pointed to the differences between the population of Ontario ? 11 million ? and asked if there were any similarities in population trends with Bermuda.

Asked if the DNA results had to be treated with a slight degree of caution as a result, Ms Malik said that even when the differences were taken into account the chances of another DNA match were rare.

Ms Malik later said she could not say when or how blood was deposited on the watch.

Mr. Griffiths said at least four people could have contributed DNA to the Fubu shirt. ?It appears that a number of people may have worn that shirt,? he said.

?A number of people had casual contact with that shirt,? replied the scientist, who confirmed there was no way of knowing who had worn the shirt last, or who wore it when the blood was deposited on the inside surface.

During cross-examination from John Perry, QC, for Robinson, Ms Malik said she did not test how Jahmal?s blood got on the door of the white van. She said she did not know if he contacted it directly or it was stained in another way.

She also confirmed that Robinson?s DNA was not found after tests of the swab of blood on the side door were carried out.

Earlier yesterday Det. Con. Sylvester Augustine told the court he did not recall seeing phone call print outs detailing calls made to and from Burgess? house, his cell phone and his wife?s cell phone.

Mr. Griffiths said Det. Con. Augustine had been involved in collecting phone evidence during the Cooper twins? investigation between June and October last year.

Burgess, 33, of Hamilton Parish, and Robinson, 34, of Southampton, deny murdering the twins on March 13 last year.

The trial continues.