Horvath's attorney Julianne Herzog tried to persuade the judge to release her client to his parents' custody. But Judge Robert O'Neal ordered Horvath to remain in juvenile detention until a psychiatric evaluation could be completed.
Horvath's parents told the judge that their son had not threatened anyone like this before, and they believe he made the threat in a moment of grief over his friend's death. After the hearing, Horvath's parents and Herzog exited the courthouse through a rear door and avoided reporters.
Harrington's daughter got a threatening text message from another friend of Hawkins on Thursday while she was being interviewed for TV's "Good Morning America." A 16-year-old boy was cited for disturbing the peace in that incident, Bellevue police said.
Meanwhile, funerals for some of Hawkins' victims were announced. A wake for John McDonald, of Council Bluffs, Iowa, was scheduled for Sunday, with a funeral the following day in Omaha. A vigil for Janet Jorgensen, a 14-year Von Maur employee, was scheduled for Sunday evening in Omaha, with a funeral Mass on Monday.
Jorgensen's family members gathered to pray for the victims and their families - including Hawkins' family.
"They're not vindictive people," family friend Paul Huntimer said Friday to a gathering of reporters at the Jorgensens' Omaha home. "It was important to Ron that prayers go out to the suspect's family."
The mall was scheduled to reopen on Saturday.
Associated Press writers Anna Jo Bratton, Eric Olson, Josh Funk, Timberly Ross and Amy Forliti contributed to this report.