Not if the the victims have a lunatic holding a gun to their head while telling family members everything is just peachy.
BTW, anyone the convicted murderers hold hostage until moving on to the next victims, will be killed. No way they can leave anyone alive.
If they’re “ditching the bodies in inconspicuous places at night,” how are those victims telling family members everything is peachy, no matter how many guns are being held to their head?