70% of rappers are liars. Pretty much unless you were in Wu Tang you probably weren't doing anything noteworthy in the streets.
Ross takes the biggest L here because unlike all the other rappers lying, he was actually exposed. And it's not like he was exposed as a chemical engineer, or a banker, or a sanitation worker (

). He was exposed as a CO. A cop. And while it didn't kill his career, it killed his credibility forever.
I like Ross' shyt, tho I haven't heard Mastermind. But there will always be an asterisk near his name.