28 year old Troy E Petersen of Essex, Iowa was shot and killed Wednesday morning by a Council Bluffs police officer after a high speed chase. The chase began in Pottawattamie County around 2am after an attempted traffic stop. It ended around 4:30 when a Council Bluffs officer fired one round that struck Petersen in the head after he was threatening to shoot his passenger, 44 year old April Montello-Roberts of Shenandoah. Authorities further state both Petersen & Roberts were connected to the Sunday murder of 52 year old Jerrot Clark of Council Bluffs. Roberts is currently being held at the Pottawattamie County Jail without bond on murder, robbery and burglary charges.