Khizr Khan, who as a Gold Star father of a soldier killed in the Iraq war spoke out against Donald Trump at the DNC, has reportedly deleted a website for his Muslim immigration-focused law firm after Trump dragged out their rivalry on Twitter. Khan, a Pakistani-born lawyer who moved and settled in the US in the 1980s, has been providing legal support in immigration cases. He specializes in the controversial EB-5 visa program for foreign investors. This week, a website of Khan’s firm went offline and remains unavailable. Khan gave no explanation to his website’s disappearance, but some media reports allege it was not accidental. According to Breitbart News, Khan has close ties to Hillary Clinton, the government of Saudi Arabia, and is helping mostly wealthy Muslims to make their way into the US. Khan and his wife Ghazala Khan have been in the spotlight since supporting Clinton at the Democratic National Convention in Philadelphia last Friday. In his speech, Khan spoke about his son Humayun Khan, a fallen Gold Star soldier, who was killed in Iraq in 2004. Accompanied by his wife, Khan lambasted Trump for his anti-Muslim comments and proposal to bar non-American Muslims from entering the US. Holding up a pocket-sized US Constitution, Khan questioned Trump’s knowledge of it. “Have you even read the United States Constitution? I will gladly lend you my copy,” Khan said. The GOP presidential nominee responded to Khan via his Twitter account, saying that he was “viciously attacked by Mr. Khan.”