What have you noticed about behaviour?
Is he not following the rules or not doing work as per your organisation standards.
Do not go by what previous person has told.There are always 2 sides to every story.
You see his current performance and judge, unless there is some open fraud, mistatement ,false documentation involved.
Counsell the employee about shortfalls in job and if no improvement then terminate his employment by following principles of natural justice.Documentation of shortfalls and counselling can be maintained to invoke the clause of termination if warranted.