"I was shocked, but I definitely don't put it past him and his wife to do something like this," Ismail Salahi said. He said the White House dinner crash is just the latest in a pattern for his badly-behaving brother and his wife.
"Anybody who digs a little bit on them will find they love media attention. They love the press," he said.
On CNN's "Larry King Live" Monday night, the couple's friends came to their defense.
"[Michaele] did say she was officially invited to the state dinner. However, I never saw the invitation," friend Theresa Foss-Conlan told King. "I know that she had correspondence with the social secretary about the attire…she had her on some type of list."
Now, White House social secretary Desiree Rogers is facing scrutiny of her own.
Critics say Rogers broke protocol, failing to station staff members at the gate, checking guest lists alongside the Secret Service -- a practice that has been standard for years.
"You always saw the social secretary right when you came in -- she's the first person you saw after security," Carol Joynt, Washington columnist for the New York Social Diary, told ABC News.
This morning, White House press secretary Robert Gibbs weighed in on the situation, telling "Good Morning America's" Diane Sawyer that White House security procedures are being reviewed.
"We will do everything in our power to make sure that going forward, whether it's procedures here at the White House or Secret Service, that we adequately address any shortcomings that are identified, and ensure the safety and security, not just of the president but anyone who comes here to the White House," said Gibbs.
As for the president, Gibbs said he was very concerned about what happened but has confidence in the Secret Service.
"All involved want to figure out what happened and what we can do to ensure something like this doesn't happen again," Gibbs said.
The Secret Service is taking full responsibility for the security breach saying the agency is "embarrassed" and "deeply concerned."
ABC News' David Chalian contributed to this report.