A nice story but another "urban legend" I'm afraid. The Urban Legend report:
The saga of Nathan Radlich's cremated sister's remains provides an interesting illustration of the difference between a legend and a news story. On 13 May 1993, thieves broke into the Radlich home in Boynton Beach, Florida, and made off with a cellophane-wrapped package of greyish-white powder that had been kept in a fishing tackle box at the head of the homeowner's bed. Radlich's television, VCR, radio, and watch were left undisturbed by the intruders — all they appeared to have wanted was the contents of that tackle box. Detectives working the case stated they had an awful feeling about why the ashes were stolen: they suspected the powder was mistaken for cocaine.
And there matters rest. In the real life tale, there was no bullet-riddled corpse turning up on Nathan's doorstep, no explanatory note left by the disappointed drug buyers. Even the bit about Radlich appealing on TV for the return of his sister's cremains was manufactured to make a better tale.
Well, at least were the cremains lifted because someone was fool enough to mistake them for cocaine? Barring the thieves someday stepping forward to explain the whys of their theft, we'll never know. Speculation on the part of the detectives is just that — speculation. Maybe the ashes were taken by a relative or friend who felt Gertrude deserved a better final resting place than a tackle box. Maybe they were lifted by someone curious about the nature of cremains, or by someone who for his own creepy reasons wanted to have a box of someone's ashes.