what are my chances of making carrier in forensic medicine as a forensic pathologist?
Relevant training and experience outside the U.S. can be "helpful", but it can be difficult to have that training formally recognized in a way that would mean you didn't have to repeat some or all of it with a U.S. accredited institution. Depending on what it was, it can "help" as far as showing that you kinda know what you're getting into much as an elective might. However, some countries do things very differently from the U.S. -- that may be the legal system or the medical system or something else. Depends on what kind of training and experience we're really talking about.
Forensic "medicine" sometimes implies that you're working with living patients, though the definition isn't strictly so. Very, very few forensic pathologists or FP training programs in the U.S. work directly and regularly/systematically with living patients/trauma survivors, though most probably get sporadic calls and questions from time to time from law enforcement or attorneys. This role is largely filled by other medical staff, forensic nurses, or, frankly, the survivor's personal statements without medical corroboration; unfortunately very few clinical personnel have a lot of formal training in this, even though the expectations are high particularly for pediatricians and certain pediatric specialists. In some other countries, however, it is a regular part of their routine, with what amounts to an outpatient clinic for performing exams and documenting injuries on survivors/alleged victims on behalf of law enforcement/government.