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A November trial for a teen accused of fatally beating his 15-year-old girlfriend and dropping her body in the Jordan River has been delayed until delayed until 2016.

Attorneys for Darwin Christopher Bagshaw asked for the continuance on Friday, telling 3rd District Court Judge James Blanch they need more time to prepare, in part because they've been unable to have the teen review a new piece of evidence in the case.

Blanch reset the 12-day trial to March 7 and said the date should be considered "firm."

The 18-year-old Bagshaw is charged with one count of first-degree felony murder for the death of Anne Kasprzak three years ago. Bagshaw was 14 at the time of the September 2012 slaying, and was originally charged in juvenile court with murder and second-degree felony obstructing justice. The latter charge was dismissed in April when the case was moved to adult court.

Kasprzak was reported missing from her Riverton home March 10, 2012. Her beaten body was pulled from the Jordan River in Draper the next day.

Prosecutors contend the murder was premeditated, saying Bagshaw lured Kasprzak to the river, killed her and dumped her body, and then tried to cover up the crime.

An autopsy concluded Kasprzak had suffered up to nine blows, which left her skull fractured and her forehead shattered.

Kasprzak had been telling friends and family she was pregnant with Bagshaw's baby. However, during a hearing in juvenile court, her stepfather testified that she wasn't pregnant.

Bagshaw was charged in October 2014 and arrested at a residence in Colorado where he was living with family.

Bagshaw has been held in the Salt Lake County jail since June when he turned 18. Bail is set at $1 million.