Shannon Guess Richardson, 36,was officially sentenced to an 18-year prison term on Wednesday morning for sending letters laced with ricin to President Barack Obama and others last year from her New Boston, Texas, home.

She was also ordered to pay $367,000 in restitution for the costs associated with the investigation.

Late last year, Richardson pleaded guilty to developing and producing ricin for use as a weapon.

See more coverage in Thursday's online and print editions.

Published: 07/16/2014