Michael Jackson's (search) defense team plans to vigorously attack the credibility of the mother of the boy whose allegations led to last week's arrest of the pop superstar, Fox News has learned.

In addition to videos in which the mother and son say they love Jackson and have never seen any inappropriate behavior — first reported by Fox News last week — sources said there are written statements echoing those sentiments, which were signed late February by the boy and his mother in front of Jackson's attorney Mark Geragos (search).

Jackson was booked Thursday on suspicion of child molestation and released from the Santa Barbara sheriff's office after posting $3 million bail.

Fox News has also learned the Jackson team has been flooded in recent days with calls from witnesses who were at Neverland Ranch (search) while the boy was there. The witnesses said the boy always acted happy and did not seem troubled.

There are also some employees of Jackson who said they saw the mother of the boy often arguing with the singer — sometimes, they said, high on crack — and that she made demands.

The mother was becoming such a concern to the Jackson team, sources told Fox News, that they brought in two employees from late January to March to specifically keep an eye on her at Neverland, so she "would not freak out."

Some members of the Jackson team told Fox News they believed the molestation case was all about greed from the accuser's mother. They said as early as late January she was making verbal threats, saying "she could go to the tabloids and tell some stories if they didn't take care of her."

The defense team also planned to launch a massive assault on the district attorney, who they've said from the beginning was out to get Jackson.

Also, a Web site, www.mjnews.us, has been launched to update fans on news on the case. On the site, Jackson says the charges are "predicated on a big lie" and that he will be exonerated in court.

Meanwhile, police seized a dozen explicit love letters and poems allegedly written by the pop icon to his accuser, according to several international newspaper reports.

Fox News has learned of a number of reports claiming that about 12 love letters and some poems were taken from Jackson's Neverland Ranch during Tuesday's raid.

Court TV's Diane Dimond, who broke news of the raid, confirmed those reports Sunday on Fox News.

Also Sunday, another superstar and longtime friend of Jackson's came out decrying the sex abuse accusations and the intense media coverage of the case.

"I thought the law was 'innocent until proven guilty,'" said actress Elizabeth Taylor. "I know he is innocent, and I hope they all eat crow."

In other developments, the television show "Celebrity Justice" has learned that Jackson broke down after his Thursday arrest when he returned from Santa Barbara.

Surrounded by family and friends in the same Las Vegas building where his sister LaToya lives, Jackson sobbed and said, "I can't believe this is happening to me," a source present at the gathering told "Celebrity Justice."

But contrary to previously published reports, Jackson remained calm during Thursday's flight from Las Vegas to Santa Barbara on his way to turn himself in to authorities.

The company that chartered Jackson's private jet told Fox News it had found two video cameras stowed away in some baggage compartments with film of the flight on them. The company said it hadn't placed the cameras, but found them during a routine sweep of the aircraft.

Fox News viewed the tapes without audio and saw a calm, often smiling or laughing Jackson — not the sobbing, emotional wreck a British tabloid reported him to be during the plane ride.

Jackson surrendered to Santa Barbara County (search) authorities without incident on Thursday after an arrest warrant was issued alleging he committed lewd or lascivious acts with a child under 14.

Authorities have said they expect to file formal charges sometime after Thanksgiving. Jackson's arraignment is scheduled for Jan. 9.

After posting $3 million bail, Jackson flew back to Las Vegas, where he had been working on a music video. But attorney Geragos told The Los Angeles Times he planned to meet with Jackson at the star's Neverland Ranch near Santa Barbara on Saturday.

Media reports have said Jackson's alleged victim is a 12- or 13-year-old cancer survivor who visited him at Neverland where the singer was known to hold sleepovers for children and share his bed with youngsters.

Small gatherings of Jackson's fans held candlelight vigils around the world Saturday to support the pop megastar.

There were rallies from Los Angeles to Toronto to Rome, but each typically drew just a few dozen fans. Vigils were planned over the weekend in more than a dozen cities, and others were to follow in China and Australia.

In Los Angeles, about 25 supporters gathered at Jackson's star on the Hollywood Walk of Fame outside Grauman's Chinese Theater. They chanted "Michael's innocent!" and set candles in the shape of a heart around the star.

In Las Vegas, about 25 fans gathered outside the CMX Productions studio, where Jackson had been working on the video.

In Paris, about 60 fans gathered on the Champs Elysees and marched through crowds of shoppers to the Arc de Triomphe. They held candles and banners with slogans of support and sang "We Are the World," the 1985 African famine relief anthem written by Jackson and Lionel Richie.

"It's really hard for us," said Pascale Hatot, a 37-year-old fan from the suburbs of Paris. "I haven't been able to sleep or eat for three days."

Supporters in Rome gathered at the foot of the Spanish Steps just after darkness fell. They held candles and a sign in Italian that read: "Michael: Accused but not guilty!"

Jackson's official spokesman, Stuart Backerman, said the singer had received hundreds of supportive e-mails and was buoyed by his fans' loyalty.

"The demonstrations around the world reinforce his long-standing feelings for his fans," Backerman said. "He's grateful."

Fox News' Trace Gallagher, Rita Cosby, Anita Vogel, Catherine Donaldson-Evans and The Associated Press contributed to this report.