Seven people from one traveller family abused and beat up to 24 vulnerable men they kept in captivity making them work without pay, a court has heard.
The six men and one woman deny servitude and forced labour charges at Luton Crown Court.
Police found men living in squalor at the Green Acres caravan park in Bedfordshire last September.
The Connors controlled and exploited the homeless people making considerable amounts of money, prosecutors claim.

Inflation may stay above 3% during the rest of this year, according to Paul Tucker, a deputy governor of the Bank of England.
Mr Tucker said the short-term resilience of inflation was "bad news".
Separately, the Bank has warned of the possibility the economy may fall into recession again this year.
Its Monetary Policy Committee said output may drop in the first six months of this year, after contracting in the last quarter of 2011.

A private equity firm has bought a UK college with its own degree-awarding powers - in a groundbreaking deal for the UK's higher education sector.
The College of Law has been bought by Montagu Private Equity for an amount approaching £200m.
The college, set up as a charity, provides law courses in London and in other regional centres in England.
Nigel Savage, the college's chief executive, welcomed the takeover by this "well-resourced partner".

Companies should give a job to "the surly young man in a hoodie", the employment minister is to say.
In a speech later, Chris Grayling will say that "it's easy to hire someone from Eastern Europe with five years' experience", but firms should take a risk on less obvious "local recruits".
He will also attack those who "rail with outrage" at the idea of young people doing unpaid work experience.

A cross-party parliamentary inquiry into how safe children are online has concluded the government and internet service providers need to do more.
It found that children were easily accessing pornography and websites showing extreme violence.
The inquiry called on the government to back moves for stronger filters of adult content.
The MPs also recommended that the government appoint an internet safety tsar.
The inquiry said that internet service providers (ISPs) and the government should work together to draw up guidelines to make it clearer to parents what safety settings were available on their home computers and other internet-enabled devices.

UK unemployment has registered its first fall since last spring, according to official figures.
Unemployment fell by 35,000 to 2.65 million over the December-to-February period, according to the Office for National Statistics (ONS).
The unemployment rate edged down from a 12-year high of 8.4% to 8.3%, the lowest level since the summer of last year.
The claimant count rose by 3,600 in March to 1.61 million.

According to recent polls, Barack Obama is trouncing Mitt Romney nationally among likely female voters, and many have pointed to the supposed Republican “War on Women” as the reason for Obama’s lead. Those who argue that the war is real cite examples like the strong Republican opposition to Obama’s proposed contraception reform and the extreme pro-life stances of people like Rick Santorum—who has said that abortion is wrong even in cases of rape and incest—as instances of lawmakers wading too far into women’s issues. Republican efforts to redefine rape to reduce access to abortions, cut funding for Planned Parenthood, hold a hearing on contraception without any female panel members, and (in South Dakota, at least) make it legal to kill doctors who perform abortions have not helped their case with some women, either.