A helicopter at a height of 500m drops a package which falls to the ground in a time of 10s. Neglecting air resistance and assuming the acceleration is constant and equal to 10m/s

the cellphone, they would then know if the killer would have contacted them or always hated them. or if it was a breakup. but if that is not the case, then it would be the clothing. to put in a bullet, it would have to be put in by hands. hands have finger prints which, would have giving you the answer of who done it.

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god i hope this !