The man then put the girl on the highway and drove off, side-swiping the deputy's car and striking his wife, police said. He sped into downtown Baton Rouge and knocked down at least three utility poles before his car hurtled through the air and overturned on top of another vehicle.

All three were taken to Our Lady of the Lake Medical Center. The child was in "extremely critical" condition, with a cut "along her midsection and a kitchen knife lodged in her head," McKneely said.

Her mother, who was thrown 20 to 40 feet by the impact of the car, also had numerous stab wounds, he said. She was expected to live. The man was being treated for minor injuries, McKneely said.

He said police will not release the man's name until he is released from the hospital and booked into jail; the woman's and child's names were withheld because they are victims, he said.

McKneely said the couple, who was not identified, has been married for about six years but were currently living apart. It was not immediately clear what led to the stabbings.

A total of 4,448 women, 2,248 in Zimbabwe and 2,200 in Uganda, were involved in the study. The women were recruited mainly from family planning clinics, and in Uganda some of the women were those classified as "higher risk" women.

At quarterly visits for up to two years, participants received HIV tests and standardized interviews about their contraceptive and sexual behavior.

The researchers said they use cox proportional hazards modeling to compare time to HIV infection for women with circumcised primary partners to women with uncircumcised primary partners, controlling for sexual behavior and demographic variables. Analytic techniques permitted predictor to change over time.

Recently, a joint United Nations program on HIV also noted with considerable interest results of a trial carried out in Gauteng province in South Africa among men aged between 18 and 24.

Preliminary results of the study showed that circumcision reduced the risk of contracting HIV by 70 percent, a level of protection far better than 30 percent risk reduction set as a target for an AIDS vaccine.

The Coast Guard has started two investigations, relieved the Healy's captain, pulled all diving equipment off the ship and suspended all polar diving. But nothing has been said about what might have killed Hill, 31, and Duque, 22, on Aug. 17, or when the investigations will conclude.

"We can get no word whatsoever, and that's tough," Hill's father, William Hill Jr., said. "We can't even get the death certificates."

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The Healy was on a research mission backed by the National Science Foundation. On board were three dozen scientists collecting data that would help them map the ocean floor and study the Earth's crust to better understand earthquakes, tsunamis and plate tectonics.

Hill, the ship's marine science officer and a native of St. Augustine, Fla., was an experienced civilian diver before she joined the Coast Guard about four years ago. Her shipmates described her as a fun-loving officer who, during a trip to the North Pole last year, posed on the ice in a bikini by a red and white striped pole.

Duque, whose responsibilities included keeping the Healy's decks in order, operating machinery and driving launch boats, was from Miami. Colleagues said he was exceedingly professional and inspired others to take their jobs seriously.

Both attended the Navy's dive school, which is required of all Coast Guard divers.

The pair had been underwater for about 10 minutes, estimated Harm Van Avendonk, a University of Texas geophysics researcher, and something appeared to be wrong.

"I saw people from the bow looking intently down on the ice, and I sensed immediately that they didn't look relaxed," he said. "It was taking a long time for the divers to reappear."

In a blur, the crew's training took over, several witnesses said.

The divers were pulled up by the ropes. Blankets and stretchers were rushed onto the ice, and EMTs immediately began performing CPR.

The divers were carried to the ship's sick bay, where they were pronounced dead roughly two hours after the dive.

"What I can tell you is this: These people were very well trained. Every time we did something we had to have a safety briefing," said Steve Stevenoski, a high school teacher from Wisconsin Rapids, Wis., who was videotaping the frozen seascape when he heard shouts from the dive support team.

"There was an accident that was completely unforeseen," he said.

According to Coast Guard protocol, they would have created a "dive profile," detailing who was diving, how far down they were going and how long they would spend at various depths.

Typically such plans are drawn up by a ship's dive officer, though the captain is ultimately responsible for the safety of divers. That could explain why Capt. Douglas Russell was relieved of command less than two weeks later. Vice Adm. Charles D. Wurster, commander of the Coast Guard in the Pacific, said he had lost confidence in Russell.

The only signs of the tragedy during a recent tour of the ship were a grief counseling pamphlet on a table in the scientists' lounge and the locked and empty room where dive equipment was stored. The equipment was shipped to the Navy's dive school in Panama City, Fla., for examination.

One Coast Guard investigation is focusing on the root cause in hopes of preventing future accidents; the other is a broader administrative investigation that could result in findings of responsibility.

One investigator, a lieutenant, said Hill and Duque were the first Coast Guard divers to die under water since the 1970s.

The Coast Guard described the dive as routine, but any dive in frigid waters beneath 4-feet-thick ice poses serious dangers. The cold can numb the extremities. Divers typically wear dry suits, which use air to help determine buoyancy. Such suits can balloon during ascents as pressure decreases - if the diver doesn't release the air quickly enough, he or she can shoot toward the surface and crash into the ice.

They also must use equipment that can handle the cold, such as breathing regulators outfitted with rubberized covers filled with antifreeze.

The deaths were hard on the Healy's crew of 75, said Ensign Stephen Elliott, who was on the ice as part of the dive support team that day.

"These are people you watch movies with, eat with, joke around with," he said. "It's hard to explain to someone who doesn't live on a ship what it's like to be a shipmate. They were incredible shipmates."

McCormack warned that the nature of Scotland's sex industry is undergoing a sinister change, with Scots men now buying sex from "good-looking" foreign underage teenagers rather than older local drug-addicted women.

But he has levelled criticism at other forces for failing to deal with the problem and warned of a lack of resources to tackle human trafficking.

Scotland on Sunday can reveal that police are gathering shocking new evidence of children targeted by gangs overseas and brought into the UK, sold between brothels and taken to private flats and houses in Glasgow, where they are forced to work as prostitutes.

McCormack said: "We can see the trend is changing. We have intelligence that Chinese and Slovakian girls from the age of 12 are being prostituted in the south side of Glasgow.

"We have heard of a 12-year-old girl being prostituted for £10. Others cost £20-£30. They are good looking. Half of the local prostitutes are junkies charging £60. The punters are anyone - people coming out of pubs are offered girls. There is a huge child prostitution issue."

McCormack said they had intelligence Glasgow was being used as a dumping ground for trafficked girls. Most were sold in London airports and put into London brothels, he said. But they were moved on when the police started investigating. "The Albanians have contacts in Scotland through the Albanian community. Glasgow is just a place they come to," he said.

McCormack added: "There is evidence that children from Slovakia are coming through the country with no problems, because there's no visa needed. The traffickers can make millions from girls in brothels.

"We know the Scottish Executive is interested, but we need more staff and more money. We only have two staff at the moment working on this in Strathclyde and we are the experts for the whole of Scotland. We do not have enough police officers to look at this problem.

"Police in Edinburgh have said they don't have a human trafficking problem, but that's impossible. I don't think they know what's happening in their areas. No one is asking the questions, and if they don't look at it they won't find it."

An Executive spokeswoman said: "We are working with the Home Office to make sure the law on human trafficking is as robust as possible. Last month, responses to a Home Office and Scottish Executive consultation on human trafficking were published, and they will inform a UK action plan on preventing, arresting and prosecuting offenders and helping victims."