My thoughts on the garrote based on pure speculation: It's useless and likely only a prop. No way is it an actual AEA device. The person who constructed/applied it has no real knowledge of actual AEA devices - beyond maybe that they exist. There is no real reason for the paintbrush, and no real reason to break the paintbrush. So, what do we know which discounts the possibility that there was strangulation by hand or a different item prior to the application of the garrote? And, is there anywhere I can find a detailed diagram of the garrote construction?