The PMDB is also the party led by Senator Jader Barbalho, the recently elected Senate President heaped with serious corruption charges.
Jader Barbalho was corrupt
The context only states that Jader Barbalho was charged, it doesn't say if he was found guilty, the charges may have been false. The system likely could not understand the difference between guilt and being charged. 
( z1 corrupt :ARG1 ( z2 person :name ( z3 name :op "Jader" :op "Barbalho" ) ) )