What happened here? Tenant created problem?

[Sean Witherspoon]

I have no idea how this happened. But I have to call a plumber. I wonder if this was a tenant created issue or a house issue. The house is only 5 years old though. Thoughts?

[Peter M.]

@Sean Witherspoon Looks like the washing machine or dishwasher drain line backed up and the soapy water pushed back into the house. Should have come up from the tub before the toilet though. Plumber might be able to find a smoking gun when he snakes the line but otherwise it might be hard to prove tenant caused it and you'll just have to eat the repair cost. Plumbing gets expensive quick though. Good luck