What are the (3) characteristics of distinguishing a cast-off pattern?

What are the (3) characteristics of distinguishing a cast-off pattern?

1. Linear.
2. Bloodstain tails point direction of objects movement.
3. Elliptical shape and far distance due to speed of motion.

What is the definition of a cast-off pattern?

What is the definition of a cast-off pattern?

Answer: Bloodstain pattern resulting from blood drops released from a moving object. E.g. swinging of a weapon back and forth during a stabbing.

What characteristics (4) does an expiated bloodstain pattern show?

What characteristics (4) does an expiated bloodstain pattern show?

1. Varying levels of force.
2. Varying stain sizes.
3. Air bubbles present.
4. Diluted due to saliva.

What is the definition of an expiated pattern?

What is the definition of an expiated pattern?

Answer: Bloodstain pattern resulting from blood forced by airflow out of the nose, mouth or wounds.

Why may projected patterns appear as waves?

Why may projected patterns appear as waves?

Answer: Due to fluctuations in blood pressure e.g. burst of an artery - changes in blood pumping from the heart.

What is the definition of a projected pattern?

What is the definition of a projected pattern?

Answer: Bloodstain pattern resulting from a volume of blood ejected under pressure. E.g. arterial spray.

What information (1) can mist patterns provide in a crime scene?

What information (1) can mist patterns provide in a crime scene?

Answer: Provide information on type of weapon used. Such as a gun which has extreme force applied to it.

What is the definition of a mist pattern?

What is the definition of a mist pattern?

Answer: Bloodstain spray pattern of micro-drops of blood as a result of applied force.

What is the definition of a void pattern?

What is the definition of a void pattern?

Answer: Absence of blood in an otherwise continuous blood trail or bloodstain pattern.

How can distribution of impact patterns provide information of where point of impact was?

How can distribution of impact patterns provide information of where point of impact was?

Impact close to surface - clustered stains.
Impact far from surface - wider distribution of stains.

What are (4) characteristics of an impact pattern made by a blunt force trauma?

What are (4) characteristics of an impact pattern made by a blunt force trauma?

1. 1-4mm drops
2. Elliptoid shape
3. V shape distribution
4. Provide information of relative locations of offender and victim

What is the definition of an impact pattern?

What is the definition of an impact pattern?

Answer: Bloodstain pattern resulting from an object striking liquid blood.

What is the difference between forward spatter and back spatter?

What is the difference between forward spatter and back spatter?

Forward spatter: Blood drops that have travelled in same direction as impact force - outward and away from source.

Back spatter: Blood drops that have travelled in opposite direction of impact force - back towards perpetrator.

What is the definition of impact spatter?

What is the definition of impact spatter?

Answer: Bloodstain pattern resulting from an object striking liquid blood.

What information can a satellite stain provide?

What information can a satellite stain provide?

Answer: Indicates individual or object may've been stationary for a period of time.

What is the definition of a satellite spatter?

What is the definition of a satellite spatter?

Answer: Smaller bloodstain that originated during formation of parent stain as a result of blood impacting a surface.

What are (2) examples of projected pattern spatters?

What are (2) examples of projected pattern spatters?

Answer: Arterial spray and expirated.

What are (2) examples of impact pattern spatters?

What are (2) examples of impact pattern spatters?

Answer: Gunshot and blunt force trauma.

What are secondary spatter stains called?

What are secondary spatter stains called?

Answer: Satellite spatter.

What is the definition of a spatter stain?

What is the definition of a spatter stain?

Answer: Bloodstain resulting from blood drop dispersed through the air due to an external force applied to a source of liquid blood.