48 Hours S38E23 - The Root Beer Float Murder

What begins as a burglary investigation quickly turns into something far more sinister. When a thief is caught in the act, he sends police down a trail of evidence that reveals the murder of Harold Allen, involving thousands of text messages, unusual poisons and a root beer float. How did a sweet treat become central to a deadly crime? 48 HOURS correspondent Peter Van Sant reports in "The Root Beer Float Murder."