HOUSTON (KTRK) --The pain so deep, it's hard to express. This heartbroken mother can't believe her son is gone.
"I do love him a lot but it's hard for me to talk right now I cannot say too much," the mother of David Guzman said.
Family and friends were left consoling each other, trying to come to grips with this tragedy. "It's a tough time for us. Be the same for y'all if it happened to you," Xavier Chavez, David's brother, said.
Armored truck security guard David Guzman was at the Wells Fargo on 290 and Hollister on Tuesday night when he lost his life. Investigators say Guzman was servicing the ATM when a gunman ambushed him. The man sprayed something in Guzman's face, shot and killed him, and then robbed Guzman of the cash.
"He was a joyful man. He loves playing with all of us," Chavez said. Guzman never missed the opportunity to joke around with loved ones. He was fun and loved his family dearly.
VIDEO: Armored guard killed during robbery at Wells Fargo bank
"We talked every day. He was my brother. That's what relatives do. No matter how far they are from you, you got to keep with them."
Xavier says he'll miss those candid conversations. But, now he's looking forward to finding justice for his big brother.
"Just let the police do their business, and that's with their jobs. Just let them do that."
No arrests have been made in the case.
PHOTOS: Guard killed while refilling ATM in NW Houston