The need to learn French was identified when threatening letters were sent by the Russian government in this language.

Forbes sent threatening letters to Brown's backers in an attempt to get money.

After losing the case he sent threatening letters to the judge and was arrested.

Have you, at any time, sent threatening letters to members of the Bamford Hunt or people connected with it?

Phone calls, threatening letters, nuisance sabotage at the site, that sort of thing.

Investigators have also said that threatening letters sent to the 11th Circuit courts may be tied to the bombings.

If the bank hadn't been so scared of him, they'd probably be sending him threatening letters by now.

There has been an attempt on her life, there have been threatening letters.

The governor's office received hundreds of threatening letters and e-mails; others threatened to kill his children.

After she had cut off ties with Skaf, she was subjected to threatening phone calls and letters.