The trial for the police officer charged in the shooting death of Philando Castile began today - here's what we know so far

Ramsey County Sheriff's Office via Associated PressThis Thursday, Nov. 17, 2016 photo provided by the Ramsey County Sheriff's Office shows Jeronimo Yanez. Yanez, a St. Anthony police officer, who is charged with second-degree manslaughter in the shooting death of Philando Castile, turned himself in Thursday, and was processed and released.Jury selection began Tuesday for the trial of Jeronimo Yanez, the St. Anthony, Minnesota police officer charged in last July's fatal shooting of 32-year-old Philando Castile.

Yanez, 29, is charged with second-degree manslaughter and two counts of dangerous discharge of a firearm.

The case is being heard in the Ramsey County District Court in downtown St. Paul, Minnesota, and the court is expected to take several days to narrow the pool of 50 prospective jurors. One woman has already been dismissed from the jury pool after it was determined she was related to Yanez.

According to the Pioneer Press, the jury pool contains "a handful of people of color," and a little more than half are men.

A friend and former colleague of Castile who attended court on Tuesday told the Pioneer Press he wished the jury pool was "a little more diverse," but he still believed they can be fair.

Here's what you need to know: