DETROIT -

A jury in the manslaughter trial of a Detroit police officer concluded its first day of deliberations Friday without reaching a verdict.

Joseph Weekley is accused of involuntary manslaughter and reckless discharge of a firearm resulting in death.

The jury asked to review videos that had been admitted into evidence. That includes the May 16, 2010 raid in which 7-year-old Aiyana Jones was killed. Another video is of a police interrogation of the girl's grandmother Mertilla Jones.

While the jury deliberated, Jones told reporters, "I want them to take their time and go through the evidence, do what they need to do. I don’t want them to hurry, because they might miss something important."

More: Jones grandma testifies: 'You killed my granddaughter'

Weekley says his submachine gun fired because Jones hit it. Prosecutors contend that never happened. They say Weekley showed gross negligence by failing to control his weapon.

The jurors include one African American and 11 whites. Eight are men and four are women.

Deliberations resume Monday morning.