Anyone know anything about snakes?

Found this one in our pool. Wife is freaking out and is convinced she was bitten.

https://imgur.com/a/X1wKiiL

EDIT: Consensus is Dekay's Brownsnake. Harmless.

I had a Roman Emperor moment while I considered killing it… The better angels of my nature won over. I let the snake LIVE!!

I dumped him in my garden.

I want to thank everyone for your help.