Why am I charged with child endangerment when my son wasn’t hurt?

I’m an immigrant and not yet in this country legally. I live alone with my 5 year old son and work under the table at a nearby restaurant. I was called into work unexpectedly and had no one to watch my son, so I took him to my neighbor’s house just for a few hours. I know my neighbor deals drugs but he’s always been good to my son and I’ve never seen anything dangerous happen at his house. While I was at work, the house was raided by the cops. The police are now saying I could be charged with Nevada child endangerment, even though I never laid a hand on my son and even though he wasn’t hurt in any way. They say I could face years in jail and deportation if these charges go through. What do I do to fight this? What would happen to my son if I was deported?