Hundreds of people gathered outside a federal courthouse Monday as the suspect in the kidnapping of a Chinese scholar at the University of Illinois made his first appearance since being arrested last week.

During the nine-minute hearing, 28-year-old Brendt Christensen acknowledged to the judge that he understood his rights, but did not say anything else. U.S. Magistrate Eric Long ordered Christensen held without bond in the kidnapping of Yingying Zhang. Authorities say facts in the case indicate the 26-year-old Zhang is dead, although her body hasn't been found.

Long ordered Christensen to return to the court in Urbana on Wednesday to determine bond. A preliminary hearing was set for July 14, but that would be waived if a grand jury returns an indictment before then. The federal kidnapping charge carries a maximum sentence of life in prison, according to a U.S. attorney's office spokeswoman.