Question about crockpot food safety

My brother cooked a beef roast and some potatoes in the crockpot yesterday. I think he had it on high and it was sitting there from before noon until I put it away before I went to bed around 10pm last night. Around 2 pm this afternoon, he pulled it out and turned it back on high. At some point, he turned it off and now it's sitting on the counter cooling.

I'm worried that it might not be safe to eat anymore, but I don't really use crockpots, so I'm not sure.