Bulger 's brother is now on the agency 's ' '10 Most Wanted ' ' list , sought in connection with 21 murders .
Bulger 's brother is now on the agency 's ' '10 Most Wanted ' ' list , sought in connection with 21 murders .
Bulger 's brother , a former FBI informant , is now on the law enforcement agency 's " 10 Most Wanted " list .