last week.

However, Crown Counsel Charlene Scott was able to close her case against Tyrone Calvin Simmons, 27, and Shadonna Kelly Trott, 20, with the testimony of her last witness.

The pair are charged with importing and possessing, with intent to supply, 74 grams of diamorphine, or heroin, on or before March 16.

Simmons is also charged with knowingly handling the drugs in question. Both deny the charges.

The pair were arrested after Police and Customs intercepted three over-sized envelopes containing packages of heroin and replaced the drugs with a substitute. Two envelopes were addressed to Dwan Trott and the other to Shadonna Trott. All three came from separate addresses in Lagos, Nigeria.

Det. Con. Alex Severin told the court that the heroin in the three envelopes was found to be 25 grams of 75 percent purity, 24 grams of 77 percent purity and 25 grams of 76 percent purity.

He also told the court that heroin is sold in silver-foil "decks'' for $25 on the street.

He said the decks contain approximately 11 milligrams of powder but only three or four milligrams was heroin, on average.

Simmons' defence attorney Victoria Pearman objected when Ms Scott attempted to tally the street value of the heroin.

"That's a real danger because I don't think the tobacco industry can say how much nicotine is in a cigarette,'' said Ms. Pearman.

She also objected during Det. Con. Severin's testimony on the contents of a silver foil deck holding that he is not an analyst.

The jury were sent out as lawyers engaged in legal arguments and they are to be brought back in today.