Darronte Dill and an accomplice murdered two men because they were looking to kill somebody that night, Dill told detectives.

In a taped interview played to the jury hearing his Supreme Court trial, the teenager said he committed the killings because he was "mad".

Victims Maxwell Brangman and Frederick Gilbert, who were homeless, were attacked as they slept in a shed on a dock near the Black Horse Tavern early on September 21 2008.

Mr. Brangman, 57, who was white, was hit in the head and face and stabbed four times. Frederick Gilbert, 53, who was black, was stabbed 13 times.

In the interview the morning after his arrest on September 30, Dill told detectives he stabbed the black man before he jumped into the sea and died. He then joined his accomplice in attacking the white man, "Max", slitting his throat twice "to speed things up".

"He was sitting in the chair. That's when I slashed his throat. He was still alive and I used the bricks to kill him just chucking them at him," he said, before explaining that he used books in the shed to set the body on fire.

The jury has previously heard that Dill, now 19, admitted to the killings during a Police sting operation hours before the interview. Two other detectives listened in and taped him confessing to fellow suspect Roger Lightbourne Sr. in the Police cells that he and a man named 'Mister' who he identified as Mr. Lightbourne's son Roger Jr. committed the murders.

Dill also told Mr. Lightbourne Sr. that he and Mister disposed of items including a ski mask, knife and rubber gloves in someone named Buffy's trash afterwards. Dill was unaware that detectives were listening in from the cell next door. However, in the formal interview with the Police later that morning, he admitted he'd said those things. He refused to comment on whether Mr. Lightbourne Jr. was his accomplice, referring during the interview to the second killer only as "an associate".

Detective Constable Windol Thorpe inquired: "Are you trying to protect someone, Darronte?"

He replied: "No."

Dill admitted he videoed "the white guy burning" on his cell phone. He also confirmed he and his accomplice disposed of their clothes and weapons in someone's trash in St. David's claiming they went home naked afterwards.

He said he'd been staying at the Lightbourne residence in St David's for five days before the incident where Mr. Lightbourne Sr. had been "keeping me healthy and focused".

Asking Dill about the reason behind the killings, Det. Con. Thorpe inquired: "So if you had bumped into anybody that night you would have done the same thing? You would have done the same thing if it was me walking on the dock?"

"Yes," replied Dill.

"So you were just looking to kill somebody, anybody?" asked the detective.

"Yes," he replied again.

Asked if he was a member of a gang and committed the crime to gain a rank within the gang, Dill denied that this was the case.

"What was it about?" pressed the officer.

"Like I said, I was mad," Dill repeated, but refused to state what he was mad about.

Asked if he had anything to add, he said: "I would just like to say to the people whose lives I have taken, to their families, that I'm sorry. I realise what I have done was stupid."

Dill denies two charges of murder and the case continues.