On the day they buried him, Dahir Adan's family again offered sympathy to the victims he stabbed at a St. Cloud, Minn., mall and then called for a "transparent and full investigation" of what happened Saturday night.
Police say Adan, 20, attacked a crowd at the mall with a knife before he was confronted, shot and killed by an off-duty police officer.
The violence appeared to be the work of a "lone attacker," officials said Monday, but they are looking at whether it was a potential act of terrorism.
FBI terrorism investigators have taken the lead on the case. The ISIS terror group put out a statement following the attack claiming Adan had acted on its behalf as a "soldier of the Islamic State."
None of the 10 people injured suffered life-threatening wounds.
On Friday, Adan's family recalled him as "a bright and hardworking young man" who had achieved much in his short life and would be missed dearly by those who knew him.
In a statement released through their attorney, family members also called for "a timely, transparent and full investigation of the circumstances surrounding the incident ... we deserve to know the truth about his tragic death. We also believe that the St. Cloud community and, indeed, Minnesotans deserve the truth as well."
They called on authorities "to thoroughly gather and preserve all the evidence relating to this incident including the relevant evidence at the site of the incident both electronic and otherwise."
The statement provided no other detail. But the family asked again for privacy and for the public not to "rush to judgement or conclusions until all the facts are known."