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Police identified Riad Hamad, 55, at a news conference Thursday and said the binding of his limbs and the placement of the tape was consistent with Hamad having done it himself.

Austin police homicide Sgt. Joe Chacon said family members told investigators that the Clint Small Jr. Middle School teacher had “several stressors” in his life and had talked about possibly killing himself. Police said that they think Hamad walked from his car to the lake, based on evidence they gathered at the scene.

“The car was found on the south shoreline with no signs of mysterious activity,” Chacon said.

Police said that they found Hamad’s car along Lady Bird Lake on Tuesday and searched but did not find him.

Joggers found Hamad’s body about 2 p.m. Wednesday near Comal Street and Nash Hernandez Sr. Road. Investigators said they found no signs of trauma or a struggle.

Debbie Russell, president of the local American Civil Liberties Union chapter, sent an e-mail Thursday to dozens of activists throughout the city saying that Hamad’s death had been ruled a homicide. Russell said in a later interview that she wrote that e-mail after she thought she had heard media reports that Hamad had been killed.

She said in the e-mail that Hamad had recently been under investigation by the FBI — federal officials confirmed the investigation — and described him as “NOT a terrorist but a peaceworker.” Hamad was serving as an official for the Austin chapter of the Palestine Children’s Welfare Fund.

FBI spokesman Erik Vasys said that Hamad had been a “person of interest” in a criminal investigation but that he could not elaborate.

Austin police said Hamad’s family reported him missing Monday. Family members released a statement Thursday saying that he disappeared after going to pick up a prescription at a local pharmacy.

Hamad’s body was taken to the Travis County medical examiner’s office for an autopsy. The office did not respond to an open records request Thursday for information about the case and would not confirm that Hamad’s body was there.

According to the family’s statement, which was released through an attorney, Hamad was a University of Texas graduate and had taught in the Austin school district for a decade.

The family’s statement described him as a “peace activist who worked tirelessly on behalf of those less fortunate than him and was loved and admired by many members of the local, as well as international community.”

“Mr. Hamad’s family and friends are obviously devastated over their loss,” the statement said.

Hamad had taught at Austin Community College but was fired in June 1998 after officials said he violated the school’s nondiscrimination policy by making “sexist and off-colored jokes” in class, school officials said.

Small Middle School Principal Sheila Anderson sent a letter to parents at the Southwest Austin school Thursday informing them of Hamad’s death and saying that grief counselors were available for students and teachers.

For the first time, Canadian and Japanese researchers have managed to efficiently produce a constant stream of natural gas from ice-like gas hydrates that, worldwide, dwarf all known fossil fuel deposits combined.

“We were able to sustain flow,” said Scott Dallimore, the Geological Survey of Canada researcher in charge of the remote Mallik drilling program. “It worked.”

For a decade now, Dallimore and scientists from a half-dozen other countries have been returning to a site on Richards Island on the very northwestern tip of the Northwest Territories to study methane gas hydrates.

A hydrate is created when a molecule of gas – in this case, methane or natural gas – is trapped by high pressures and low temperatures inside a cage of water molecules. The result is almost – but not quite – ice. It’s more like a dry, white slush suffusing the sand and gravel 1,000 metres beneath the Mallik rig.

Heat or unsqueeze the hydrate and gas is released. Hold a core sample to your ear and it hisses.

More significant is the fact that gas hydrates concentrate 164 times the energy of the same amount of natural gas.

And gas hydrate fields are found in abundance under the coastal waters of every continent. Calculations suggest there’s more energy in gas hydrates than in coal, oil and conventional gas combined.

Getting that energy to flow consistently and predictably, however, has been the problem. Using heat to release the gas works, but requires too much energy to be useful. Researchers have also been trying to release the methane by reducing the pressure on it.

Last month, the Mallik team became the first to use that method to get a steady, consistent flow.

“That went really well,” said Dallimore. “We definitely demonstrated that these hydrates are responsive enough that you can sustain flow.

“We were able to take conventional technologies, modify them, and produce. That’s a big step forward.”

Although countries including India, China, Japan and the United States have undertaken major programs to identify gas hydrate fields, it’s the first step in years toward making them productive.

The Mallik well produced fire from ice for six days at a rate lower than conventional gas but about equivalent to a coalbed methane well, Dallimore said.

This year’s results prove the basic idea works, he said. The next step is a full-scale pilot project with every consideration that goes into a commercial production rig, including safety and environmental concerns, and questions regarding how much water and sediment are produced per unit of gas.

Dallimore suggests that as conventional natural gas prices increase and supplies diminish, gas hydrates could offer an alternative. They also emit less greenhouse gas than oil or coal.

So far, no Canadian agency is planning a full gas hydrate pilot project.

But Japan is planning one using data from the Mallik project. The United States Geological Survey is trying to start one with other agencies and energy companies.

“Everybody agrees this is what we need to do. It’s just (a question of) where,” said Brenda Pierce of the U.S. survey. “We’re trying to look at doing this on the north slope of Alaska.”

Commercial production of natural gas from hydrates is still a few years off, said Dallimore – but perhaps not too far off.

“The last thing the public wants is fuel shortages,” with prices at record highs, Wicks said by telephone today from Rome, where he’s attending the International Energy Forum.

The minister spoke after Ineos Group Holdings Plc, owner of the Grangemouth refinery, said Scotland may suffer fuel cuts as early as April 25 because of a walkout by members of the Unite trade union over plans to change the company’s pension program.

“This is an industrial dispute about pensions between the union and the company,” Wicks said. “It is a matter for those two parties to resolve as soon as possible. There is nothing directly government can do.”

Ineos has started shutting the 200,000-barrel-a-day refinery, Britain’s sixth-largest, before the scheduled April 27-28 stoppage for safety reasons, the company said today in a statement. Output may be cut for as long as a month because of the time required to restart units, Unite said April 18.

Actually, they will take as many as they can get. Faced with the difficulty of recruiting during a long and unpopular war, the United States Marine Corps has started marketing itself to women in a concerted way for the first time. It is running ads in magazines like Shape, Self and Fitness, which appeal mainly to female readers, as well as through more mainstream outlets like “American Idol,” where the message is a unisex one of patriotism rather than macho swagger.

The Marine Corps still runs its traditional ads — during National Basketball Association and National Hockey League games, and in magazines like Sports Illustrated and Men’s Fitness — often showing male recruits parachuting from airplanes, wielding big guns, driving heavy tanks and stampeding across the ground.

In Japan and South Korea, some manufacturers for the first time have begun buying genetically engineered corn for use in soft drinks, snacks and other foods. Until now, to avoid consumer backlash, the companies have paid extra to buy conventionally grown corn. But with prices having tripled in two years, it has become too expensive to be so finicky.

“We cannot afford it,” said a corn buyer at Kato Kagaku, a Japanese maker of corn starch and corn syrup.

In the United States, wheat growers and marketers, once hesitant about adopting biotechnology because they feared losing export sales, are now warming to it as a way to bolster supplies. Genetically modified crops contain genes from other organisms to make the plants resistance to insects, herbicides or disease. Opponents continue to worry that such crops have not been studied enough and that they might pose risks to health and the environment.

“I think it’s pretty clear that price and supply concerns have people thinking a little bit differently today,” said Steve Mercer, a spokesman for U.S. Wheat Associates, a federally supported cooperative that promotes American wheat abroad.

The group, which once cautioned farmers about growing biotech wheat, is working to get seed companies to restart development of genetically modified wheat and to get foreign buyers to accept it.

Even in Europe, where opposition to what the Europeans call Frankenfoods has been fiercest, some prominent government officials and business executives are calling for faster approvals of imports of genetically modified crops. They are responding in part to complaints from livestock producers, who say they might suffer a critical shortage of feed if imports are not accelerated.

In Britain, the National Beef Association, which represents cattle farmers, issued a statement this month demanding that “all resistance” to such crops “be abandoned immediately in response to shifts in world demand for food, the growing danger of global food shortages and the prospect of declining domestic animal production.”

The chairman of the European Parliament’s agriculture committee, Neil Parish, said that as prices rise, Europeans “may be more realistic” about genetically modified crops: “Their hearts may be on the left, but their pockets are on the right.”

Military units pay an average of $3.23 a gallon for gasoline, diesel and jet fuel, some $88 a day per service member in Iraq, according to an Associated Press review and interviews with defense officials. A penny or two increase in the price of fuel can add millions of dollars to U.S. costs.

Critics in Congress are fuming. The U.S., they say, is getting suckered as the cost of the war exceeds half a trillion dollars — $10.3 billion a month, according to the Congressional Research Service.

Some lawmakers say oil-rich allies in the Middle East should be doing more to subsidize fuel costs because of the stake they have in a secure Iraq. Others point to Iraq’s own burgeoning surplus as crude oil prices top $100 a barrel. Baghdad subsidies let Iraqis pay only about $1.36 a gallon.

The U.S. military, through its Defense Energy Support Center, buys fuel on the open market, paying from $1.99 a gallon to as much as $5.30 a gallon under contracts with private and government-owned oil companies. The center then sets a fixed rate for troops, currently $3.51 a gallon for diesel, $3.15 for gasoline, $3.04 for jet fuel and $13.61 for avgas, a high-octane fuel used mostly in unmanned aerial vehicles.

Kuwait does grant substantial subsidies, but they cover only about half the fuel used by the U.S. in Iraq. And the discount is eaten up by the Energy Support Center’s administrative costs and fluctuations in the market.

Overall, the military consumes about 1.2 million barrels, or more than 50 million gallons of fuel, each month in Iraq at an average $127.68 a barrel. That works out to about $153 million a month.