WICHITA, Kan. (AP) — A Wichita woman was convicted Thursday of first-degree murder in the decapitation death of her ex-boyfriend's mother, whose head she left in the kitchen sink.

Prosecutors said Rachael Hilyard cut off the head of 63-year-old Micki Davis using two steak knives on April 9, 2017. Davis had gone to Hilyard's home with her 9-year-old grandson to collect her son's belongings, at Hilyard's insistence. The child ran away before his grandmother was beheaded and called for help.

Hilyard's lawyer acknowledged his client killed Davis but said it was not premeditated, which is required...