If you don't trust someone, be a man and learn to do it yourself. Electricity isn't all that difficult, especially if you're just doing a little homeowner project. I'm 31, and can probably wire a whole house safely with about 1 hour of training and a few YouTube videos. Might take me a little longer than a pro but I guarantee the house won't burn down. Let the dumb ones sort themselves out.

You hired the shit worker. Dead kids are on you bro.