Minneapolis police said Wednesday night's violence contrasted sharply with a mostly peaceful demonstration Tuesday afternoon at the street corner where Floyd died. The U.S. Attorney's Office and the FBI in Minneapolis said Thursday they were conducting "a robust criminal investigation" into Floyd's death and making the case a priority. The announcement came a day after President Donald Trump tweeted that he had asked an investigation to be expedited. Hennepin County Attorney Mike Freeman said on Thursday that "we have to do this right" on the investigation into the killing of George Floyd in Minneapolis police custody: "I will not rush to justice," he said on May 28, during a news conference with Minneapolis police and FBI officials. The FBI had already announced that it would investigate whether Floyd's civil rights were violated. The officer who kneeled on Floyd and three others were fired Tuesday. On Wednesday, the mayor called for him to be criminally charged. President Donald Trump signed an executive order that seeks to limit liability protections social-media companies enjoy after Twitter Inc. began selective fact checks of his posts on the platform. Under current law, companies like Twitter and Facebook Inc. are protected for users’ posts. Trump told reporters that his order “calls for new regulations under section 230 of the Communications Decency Act to make it that social media companies that engage in censoring or any political conduct will not be able to keep their liability shield.” Trump’s move comes after Twitter earlier this week labeled two of his posts about mail-in voting “potentially misleading” and provided links to news coverage of his comments. The president responded with outrage, accusing the social media company of censorship and election interference and threatening to possibly shut down the service.