U.S. Senator Mitch McConnell says he remains confident the person or persons responsible for the Boston terror attacks and for sending poisoned letters to President Obama and a Mississippi senator will be brought to justice.
Kentucky's senior Senator spoke on the floor and praised postal officials who kept the letter addressed to Senator Roger Wicker from reaching the Capitol.
Senator McConnell says the country is throwing its resources behind the investigations and he believes those responsible will be brought to justice.
A second letter testing positive for ricin was also cent to President Obama, though it also never made it to the White House.