On Tuesday, 25-​​year-​​old Casey Anthony was acquitted of killing her two-​​year-​​old daughter in a cap­ital murder case that cap­ti­vated national audi­ences for some three years. We asked North­eastern Uni­ver­sity law school pro­fessor Daniel Givelber, whose schol­ar­ship focuses on crim­inal law, crim­inal pro­ce­dure and cap­ital pun­ish­ment, to assess the con­tro­ver­sial verdict.

Why did jurors find Casey Anthony not guilty of mur­dering her daughter? What must pros­e­cu­tors prove in cases in which the defen­dant faces the death penalty?
A pros­e­cutor needs to per­suade the jury of a defendant’s guilt beyond a rea­son­able doubt. There is no way to know why a jury acts as it does, since jurors are not required to explain their ver­dicts. News reports indi­cate that the case against Casey Anthony was entirely cir­cum­stan­tial — there were no wit­nesses who tes­ti­fied that they observed her commit or cover up the crime — and the pros­e­cu­tion may not have had enough evi­dence to per­suade the jury that it was Casey and not someone else who com­mitted the crime.

The prosecutor’s burden to prove the defendant’s guilt is no greater in a death penalty case than in any other homi­cide pros­e­cu­tion; there is a sep­a­rate pro­ceeding fol­lowing a guilty ver­dict to deter­mine if a defen­dant should die. Since Casey Anthony was not con­victed of a cap­ital crime, such a pro­ceeding will never be held.

In high-​​profile cases, how do defen­dants who are charged, and then acquitted of cap­ital murder, go about living so-​​called “normal” lives?
With great dif­fi­culty. In our system, an acquittal is not an exon­er­a­tion — it simply means that the state has failed to per­suade jurors of guilt beyond a rea­son­able doubt. Jurors may believe that a defen­dant is prob­ably guilty and still acquit because they have been instructed to con­vict only if they are con­vinced beyond a rea­son­able doubt. This means someone who has been acquitted may still be treated by our legal system and society at large as though she most likely com­mitted the crime.

The Casey Anthony ver­dict received more Tweets than last season’s Super Bowl. Why did this case gen­erate so much national attention?
To state the obvious, the crime was hor­rible, the defen­dant was pho­to­genic, and the evi­dence was equiv­ocal. The case attracted so much atten­tion for many of the same rea­sons that detec­tive fic­tion con­tinues to be so pop­ular; many of us find mys­teries inter­esting, and the death of Casey Anthony’s child has been and still remains very much a mystery.