View a presentation the Snohomish County Assessor's Office offers to representatives of taxing districts each year to help them learn about the levy process. The information provided can be useful to anyone wanting to learn more about this process.
A minimum of 240 hours of instruction in fields of study relating to bloodstain pattern analysis is required. This 240 hour requirement includes the aforementioned 40 hour basic bloodstain pattern analysis course. Additionally, completion of a 40 hour photography course is also required.
What ESR method did we use in class? Westegren-blood was mixed in the plastic tube with sodium citrate and then the graduated glass pipette was filled with blood to 0mm. The glass tube must be kept absolutely vertical for 1 hour and then the level of blood is read.