Jurors in the first death-related product-tampering trial asked the judge if the defendant's daughter voluntarily offered to give incriminating evidence against her mother or provided it at the request of investigators.

Before concluding their third day of deliberations Thursday, jurors asked U.S. District Judge William Dwyer to answer their question about witness Cynthia Hamilton, but the judge declined.

Stella Nickell, 44, is charged with five counts of tampering with a consumer product for allegedly poisoning her husband Bruce, 52, with cyanide-laced Extra-Strength Excedrin, and putting contaminated Execedrin and Maximum Strength Anacin on store shelves in an effort to make her husband's June 1986 death appear to be the work of a random killer.