Members of the Sikh community sent letters to lawmakers and law enforcement officials this week urging for a full investigation into the possible role of bias in last Thursday’s mass shooting at an Indianapolis FedEx facility.

An IMPD report from March 2020 shows an officer found white-supremacist websites on the shooter’s computer during a mental health check. Months later he was able to legally purchase two rifles even though police confiscated a gun during that check.

In the letters, Sikh community leaders implore leaders to “leave no stone unturned regarding bias as a motivating factor.” Law enforcement has not yet established a clear, specific motive for the crime. Of the eight people killed in the shooting, four were Sikh.