The Billy Graham Rapid Response Team (BG-RRT) chaplains have stepped in to help the families of the victims in Highland Park, after a gunman on a rooftop opened fire on a crowd at a Fourth of July parade.
Seven people were killed and at least 30 others are injured.
The chaplains are now serving in three locations, besides Highland Park.
The crisis-trained chaplains have also been deployed to Allen, Kentucky, after three officers and a police dog were shot and killed.
They are also ministering in Mora, New Mexico, after intense wildfires burned more than 312,000 acres.
Josh Holland, international director of the BG-RRT said: "What an incredibly frightening situation. There are no words to lessen the pain of those families who are grieving right now.
"We are sending our crisis-trained chaplains to comfort people, listen and grieve with them, pray with them and share God's love with those who have been impacted by this horrific tragedy."
The suspect from the mass shooting at the Independence Day parade in Highland Park, Illinois, is expected to appear in court on Wednesday the 6th of July 2022.
If he is convicted, he will face life in prison, without parole.
According to the police, Mr Crimo had planned an attack for weeks and fired more than 70 rounds randomly into the crowd watching the parade, killing seven and injuring more than three dozen people.
The names of six of the seven victims have been released: Katherine Goldstein, 64, Irina McCarthy, 35, Kevin McCarthy, 37, Jacquelyn Sundheim, 63, Stephen Strauss, 88, and Nicolas Toledo-Zaragoza, 78.