People may be detained for up to 30 minutes before the arrival of a police officer.
When they arrive home will they be detained, or allowed to go to their homes?
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Judge Richard Hone ordered that Henry be detained indefinitely under the Mental Health Act.
Prosecutors have argued that they need to be detained so that they do not collude with witnesses.
"I do believe if she comes into the United States, she will be detained and questioned, " he said.
Six other gang members are to be detained for up to 16 years at young offenders' institutions (YOI).
Mr Collins had said illegal immigrants should be detained in closed down prisons such as HMP Shepton Mallet.
That means they could be detained up until their 21st birthdays, if convicted.
He added they had not been formally charged with the murder and would be detained while detectives investigated the incident.
His lawyers said it was unclear whether he would be detained under house arrest, in policy custody, or in jail.
Sussex Police said the couple are to be returned to the county on Sunday, where they will be detained and interviewed.
The official Mena news agency said Mr Maher's passport was confiscated and he was ordered to be detained for four days.
After a closed hearing on Friday, a German judge decided he would not be detained while the case against him continues.
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Under the anti-terrorism act, foreign nationals can be detained in the UK when it is not possible for them to be deported.
At least four other core members, including one leading member of the group who uses the handle Sabu, have yet to be detained.
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Sex offenders still regarded as a threat could be detained in a secure hospital to be built in the central city of Lyon.
The Supreme Court has previously held that alien combatants may be detained for the duration of hostilities even if they are American citizens.
The government's independent reviewer of terrorism legislation, Lord Carlile said the issue was not simply about the number of days someone should be detained.
The Supreme Court has never resolved whether US citizens or foreign nationals arrested on US soil can be detained and tried by the military authorities.
Among other things, they stipulate that suspects may only be detained for 30 days without trial and guarantees them access to lawyers while under investigation.
In 1993, in England, two 11-year-old boys were sentenced to be detained indefinitely after they were found guilty of the murder of two-year-old James Bulger.
They would only be detained anyway prior to removal if generally speaking the family has got a history of absconding and we can't find them.
He was released after serving half his prison sentence, only to be detained for a further six months for breaching a condition of his licence.
The US military considers Bagram detainees unlawful combatants who can be detained for as long as they are deemed a threat to Afghan national security.
The Department of Youth Services will rule whether the two boys will be detained longer, Lipps said, adding it will depend on their behavior and rehabilitation.
That means being patient in the face of fervent demands from activists that Zimmerman be detained and charged as soon as possible, said the attorney general.
"My view is that people should not be detained a day longer than necessary or a day shorter than necessary in the interests of justice, " he said.
But the prime minister appears unlikely to be detained soon - the head of the NAB has said there is not enough evidence to justify such a move.
However the judge said the men would not be detained indefinitely as global courts and the UN could inquire about where and how long prisoners were being held.
Experts say the teenager, who cannot be named for legal reasons, may be released within six months if he is convicted, because adults cannot be detained at juvenile reform facilities.
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