In movies you always here the same thing but How many people do you think have actually dissolved flesh in lye.boiled the bones drained off the pink stew.heated the bones to 2500F placed the bones in a cotton sack, pounded them to chunks, taken a roller till it’s dust. Sifted the remains through a mesh screen to collect the teeth and remaining bone fragments. Treated chemically and reheated to brittle charcoal then pulverized to the finest dust. Driven your daily route with a blower attached to a pipe slower dispersing the ash all over a 200 mile span. Never to be seen again. In plain some. Ground into the earth. DNA? Nah none of that left its been stripped. That cotton bag you for sure thought had DNA remains? Incinerated.