Are prosecutors obligated to believe the evidence they present at trial?

“You might think that, from an ethical standpoint, prosecutors should believe that the evidence they put in front of juries is actually true and accurate. After all, they’re state employees, paid with public funds, and they’re entrusted with enormous power. At the very least, we should expect them not only to refrain from putting forth evidence they know to be false but also to exercise some due diligence to ensure that everything they tell jurors is true.

As it turns out, that just isn’t the case. “