"There are drug-traffickers and gang leaders from the Mara Salvatrucha (street gang) there, " Mr Lopez said.
In an age of mobile telephones, gang leaders can remote-control hitmen from anywhere they like.
Gangs, and the willingness to follow gang leaders blindly by members is evident throughout Thailand.
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In Manchester, the X-Calibre project helped police identify the most important gang leaders and lock them up.
As a result, promiscuous rappers, prosperous dope peddlers and street gang leaders are becoming ever more influential role models.
Instead they agreed to have alleged gang leaders transferred to more secure federal prisons and share intelligence more efficiently.
In April, however, two gang leaders were killed, sparking a wave of reprisals.
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Gang leaders Anthony Diprose, 27, and Jason Diprose, 26, were found guilty at Preston Crown Court of fraud and supplying drugs.
Their stands are technically illegal, but they are allowed to sell as long as they make payments to local gang leaders.
He has put the police and army in control of prisons from where they believe drug gang leaders have been organising attacks.
But shortly before the truce was made public, 30 top gang leaders were transferred from maximum-security prisons to others with benefits like family visits.
Reporters say the intimidation from soldiers is escalating and in some areas is as bad as, or even worse than, the pressure from gang leaders.
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She spoke to troubled teenagers, including Los Angeles gang leaders and violent defenders of the all-male status of the Citadel, a military academy in South Carolina.
They arrested dozens of alleged gang leaders, confiscated arms and drugs and even found a list with the names and addresses of 40 military police on it.
The last time they tried to move jailed gang leaders, in 2006, the PCC unleashed a wave of violence and riots that led to the deaths of almost 500 people.
"Where I come from, the only way to get famous is being a professional football player or drug dealer, " says Cripta Djan, one of the city's more outspoken pixadores and gang leaders.
Tired of the cycle of revenge killings, gang leaders housed side by side with their enemies in a maximum security prison outside the capital of San Salvador decided to broker a deal.
The authorities believe that, even in prison, the gang leaders are capable of controlling members, issuing orders by mobile phones and directing the sale of drugs, purchase of arms, and murders of both rival gang members and security officials.
While arrests of gang leaders and massive hauls of seized arms, money and drugs make headlines, the important task of social and economic development promised by local, state and federal government programs remains a difficult undertaking, in part due to fractured and corrupt community leadership.
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We have tools to do that, but that doesn't mean sweeping up the kids who are on the street, you know, taking all of the risk being there - put there by the gang leaders to be shot at, to be arrested, to funnel the money to them - those kids are as much victims of the gangs as innocent bystanders are.
As I think we learned yesterday, yes, the President reached out to some of the Republican leaders of the Gang of Eight on immigration reform.
During my time in Darfur I don't know of gang rape at the level that the leaders of the rebels claim.
And he may be best known for leading a Justice Department probe that looked at whether or not the FBI and other law enforcement agencies leaked FBI information to two notorious leaders of a South Boston gang.
An important ally of hers is an Islamic organisation, some of whose leaders have been killed by a gang.
In the Senate, Alabama Republican Jeff Sessions and others have repeatedly expressed the fear that Democratic leaders will try to ram the Gang of Eight's plan through before other members have a chance to properly consider the bill.
The government has lauded the truce and is trying to help its long-term success by working with business leaders to offer work and rehabilitation programs for gang members.
" However, he testified Tuesday that the purpose of a March 10, 2004, meeting between White House officials and congressional leaders -- referred to as the "Gang of Eight" -- was to inform lawmakers that Comey would not approve "a very important intelligence activity.
And even some of the leaders, some of the things they said, I would point to you and note that there were some positive statements said by leaders in both houses of both parties about the work of the Gang of Six.
So last year, after admitting the gang's existence, the authorities had another go at breaking it up by shifting the new leaders from Carandiru to Taubate.
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