LAS VEGAS, NV - OCTOBER 5: A 'Vegas Strong' banner hangs near the 'Welcome to Fabulous Las Vegas' sign at the south end of the Las Vegas Strip, October 5, 2017 in Las Vegas, Nevada. On October 1, Stephen Paddock killed at least 58 people and injured more than 450 after he opened fire on a large crowd at the Route 91 Harvest country music festival. The massacre is one of the deadliest mass shooting events in U.S. history. (Photo by Drew Angerer/Getty Images)

Greg Zanis of Aurora, Illinois didn’t know what had happened at the Route 91 Harvest Festival until an employee from a local bio-recovery business showed at his front door on Monday morning with a check for $1,200.

The $1,200 was a donation to Zanis so he could bring his pickup truck filled with crosses here to Las Vegas to remember those who had lost their lives in Sunday’s shootings.  Zanis is the founder of Crosses for Losses, a non profit organization that memorializes the dead with the hopes of providing family members with a way to grieve and remember their loved ones.

Zanis’ crusade began in 1999 with a memorial he made for the victims of the Columbine High School shootings.  He has also made memorials for mass shootings that have taken place in Aurora, Colorado, Sandy Hook, Connecticut, and Orlando, Florida.

The crosses are currently on display with photos of the victims and their name at the Welcome to Las Vegas sign which is located on Las Vegas Boulevard, just south of where Sunday’s events unfolded.