In helium suffocation cases, what unusual evidence might be found?

In helium suffocation cases, the presence of bags over the decedent's head is significant and indicative of the method used for suffocation. This practice typically involves creating a sealed environment where the individual breathes in helium, leading to asphyxiation. The presence of such bags can confirm the intentionality of the act, as it demonstrates how the helium was administered and illustrates the method of death.

On the other hand, while empty helium tanks could provide context for the death, they do not necessarily indicate suffocation if they are found without other corroborating evidence. Signs of struggle might suggest foul play but are not typically associated with helium suffocation cases, which are often more controlled and deliberate in nature. The presence of medication bottles could suggest other underlying issues or factors in a death investigation but does not directly relate to the distinctive characteristics of helium suffocation. Therefore, evidence such as bags over the head most clearly points to the method and circumstances surrounding helium suffocation cases.