Shabana Ansari's attorney, Steven Kozicki, says Ansari was subjected to a long session of questioning at a police station in November and that detectives searched the home.
Police have not said if Ansari is considered a suspect. Kozicki says she vehemently maintains she had nothing to do with the July death of her husband, Urooj Khan. Police have not spoken publicly of any suspects.
Khan died just days before he was to collect $425,000 in lottery winnings.
Authorities initially ruled the death a result of natural causes, but further tests showed he was poisoned and his death was reclassified as a homicide.