Don't inject poison in your victim. Inject a syringe filled with air in their veins or between their toes, it will mimic a heart attack and the victim death will look more... different. It will just look like a heart attack even if you protagonist knows that it is a murder.
101 Murder Tips
By bumble-vee
There are more murde - writers here than I anticipated. *Please note that the information given is by no mean... More