MONTPELIER, Vt. - The Latest on a woman accused of making the deadly toxin ricin (all times local):

3 p.m.

Federal prosecutors say Vermont Health Department testing of a person whom a woman admitted to poisoning with ricin came back positive for the presence of ricinine.

Prosecutors say ricinine is an indicator of potential ricin exposure but may also indicate exposure to other castor derivatives, such as castor oil.

The department said Friday no one at the home is currently ill.

Seventy-year-old Betty Miller is accused of manufacturing ricin and testing its effectiveness on other residents of a senior living facility.

Authorities say Miller told investigators last week that she made the ricin because she wanted to "injure herself" and had tested the poison's effectiveness on other residents by placing it in their food or beverages.

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11:15 a.m.

A federal judge says the extensive mental health history of a woman accused of making the deadly toxin ricin includes suicide attempts.

The judge made the comment Wednesday at a hearing for 70-year-old Betty Miller, who was taken into custody last week after telling investigators that she made the ricin because she wanted to "injure herself" and had tested the poison's effectiveness on other residents at her retirement community in Shelburne by putting it in their food or beverages.

Miller's lawyer, Paul Volk, says he's seeking appropriate placement for Miller, who is being held at a county jail in Vermont. Her detention will be revisited when and if a suitable treatment plan is found.

Health officials say no one is currently ill from the ricin.

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12:20 a.m.

A federal judge will consider whether a woman accused of manufacturing ricin and testing the deadly toxin on fellow residents of a senior living facility in Vermont should continue to be detained.

Authorities say 70-year-old Betty Miller was arrested last week after telling investigators that she made the ricin because she wanted to "injure herself" and had tested the poison's effectiveness on other residents.

Health officials say no one is currently ill from the ricin. A judge says Miller has "a lengthy mental health history."

Miller lived for a long time in New Hampshire after marrying Dr. Joseph Miller, who later became a state legislator. A fellow New Hampshire House representative says "he was attentive to his wife, who had experienced some difficulty in coping."

News from © The Associated Press, 2017