Prosecutors omitted a previously cited injury to a U.S. Secret Service agent in a Wednesday court filing, adding another layer of uncertainty to the fast-moving investigation into the attempted assassination of President Donald Trump at the Washington Hilton.

The 20-page filing, submitted by the U.S. Attorney’s Office for the District of Columbia, urges a federal judge to keep suspect Cole Allen detained pending trial, describing the alleged attack as a calculated effort to kill the president during the White House Correspondents’ Association dinner.