The FBI said Thursday that further tests are still being done, but that lab results show the toxin was used in the mailings.
Ava, a service dog that bit the nose of a 6-year-old neighbor, has been banished from River Vale.
To nine-year-old Molly Kimball, Ava, her 14-month-old dog is more than just a pet. Molly is battling brain cancer. Ava is being trained as her service dog, and while she is apparently devoted to Molly, there are questions whether the dog is a danger to other children.