Figure 1 A sketch of a portion of crime scene 1 illustrating the three bloodstains swabbed and collected on the dining area floor. These blood droplets originated in the bathroom where the victim was stabbed to death and subsequently traveled through the home and out the door on the concrete walkway to a second home, scene 2.

Figure 2 A sketch of the bathroom from crime scene2 representing the stains collected for testing from the bathtub mat and shower curtain.

Table 1. Serological Results for Bloodstains Collected from Both Crime Scenes.

Item	KM	aHUM	ESD	ACP	PGM/subtype
Victim Reference			1	B	2-1/2+1+
Sample from ashtray	+	+	1	B	---/2+1+
Sample from cement walk	+	+	*	---	*
Bathtub shower curtain
Stain A	+	+	*	A	*/2+1+
Substrate control A	-	-
Bathtub Mat
Stain A	+	+	*	A	*/2+1+
Substrate control A	-	-
Tan Pants (Suspect A)
Stain A	+	-
Substrate control A	-	-
Stains B, C, D	-
Dining room
S-1, swab of bloodstain
S-2, swab of bloodstain				-
S-3, swab of bloodstain				-

*= typing not attempted

---= negative results

Table 2. DNA Results for Various Bloodstained Items at the Scene Attributed to Donor 1 and Donor 2.

Note: underlined alleles represent obligate shared alleles between father and son as donors in this case.