Updated

A court has ordered that a man accused of killing a New York City woman in Istanbul be placed under observation for an evaluation of his mental health.

On the opening day of his trial on Tuesday, Zaya Tasali killing Sarai Sierra but denied he had sexually assaulted her, the private Dogan news agency reported.

Sierra, a 33-year-old mother of two, was found dead on Feb. 2, days after she was reported missing while on a solo vacation in Istanbul.

Tasali's trial was adjourned until Nov. 21. Prosecutors are demanding a life sentence for Tasali on murder charges as well as 19 years in prison for sexual assault and theft.