Bloodstain Pattern Analysis refers to the gathering, classification, and interpretation of the distribution and shape of bloodstains associated with a crime. Cast-off spatters are a crucial component of a practical, scientific, and medically based reconstruction of a crime since they provide a wealth of information. The focus of the study is to determine and compare the number of primary bloodstains, number of satellite stains, and the length of cast-off trail produced by a bolo, ice pick, butterfly knife, and kitchen knife. A trebuchet was constructed to swing the instrument simulating a person swinging a weapon. The instruments were submerged in pig’s blood and then attached to the arm of the trebuchet. The trebuchet was then set in motion and produced the cast-off spatter pattern. The number of primary bloodstains, number of satellite stains, and the length of cast-off trail produced by each instrument were recorded and treated using the randomization method and the ANOVA Test. After the experimentation was carried out, the results were analyzed and yielded the following findings: For the number of primary stains, the bolo exhibited an average number of one hundred thirty-one primary stains, the ice pick yielded an average of fifty-seven primary stains, the butterfly knife had an average of eighty-seven primary stains, and the kitchen knife had shown an average of one hundred and six primary blood stains. For the average number of satellite stains, the bolo had twenty-nine satellite stains, the ice pick had an average of sixteen stains, the butterfly knife showed twenty-eight satellite satins on average, and the kitchen knife has an average number of ten for its satellite stains. For the length of the cast-off trail, the bolo had an average trail length of six hundred forty and five tenths of centimeters, the ice pick had an average trail length of five hundred seventy-one centimeters, the butterfly knife had an average trail length of six hundred nineteen and sixty-seven hundredths in centimeter, and the kitchen knife exhibited a cast-off trail with the average of four hundred nineteen centimeters.

Keywords : Cast-off, Blood Spatter, Violent Crimes, Characteristics of Cast-Off Spatter.