Authorities have not revealed a possible motive for Whitey Bulger’s killing, which has raised questions about why he was moved to a West Virginia prison nicknamed “Misery Mountain." Subscribe to WCVB on YouTube now for more: http://bit.ly/1e8lAMZ Get more Boston news: http://www.wcvb.com Like us: https://www.facebook.com/wcvb5 Follow us: https://twitter.com/WCVB Instagram: https://www.instagram.com/wcvb5/