Thomas Allen Day Jr., 54, of Corona, California, was among those killed in the mass shooting at the Route 91 Harvest Festival in Las Vegas on October 1, 2017. A home builder and devoted father, he had attended the concert with all four of his adult children. His father, Thomas Day Sr., was notified around 11 p.m. that his son had been killed.

The shooter, identified as 64-year-old Stephen Paddock of Mesquite, Nevada, fired from a 32nd-floor room at the Mandalay Bay casino, killing 59 people and wounding more than 700 others. Paddock used multiple firearms and died by a self-inflicted wound as officers approached his hotel room; investigators reported no other suspects.

The loss deeply affected Day Jr.’s family and community. If anyone who knew Thomas Day Jr. or his family can share memories or information, please come forward.