I wouldn't put it past somebody

I wouldn't put it past (someone)

Based on that person's pattern of behavior, it is not impossible to imagine them engaging in that kind of bad behavior. Do I think Joe stole the money? Honestly, I wouldn't put it past him. He has no conscience. It seems a bit far-fetched that the government is spying on us with our own appliances, but I wouldn't put it past them.

I wouldn’t put it ˈpast somebody (to do something)

used to say that you think somebody is quite capable of doing something surprising, unusual, etc: ‘Do you think he’d ever steal from his friends?’ ‘I wouldn’t put it past him.’