The raid targeted a voter registration group called Houston Votes, which was accused of election fraud. It was initiated by investigators for Attorney General Greg Abbott. His aides say he is duty-bound to preserve the integrity of the ballot box.

His critics, however, say that what Abbott has really sought to preserve is the power of the Republican Party in Texas. They accuse him of political partisanship, targeting key Democratic voting blocs, especially minorities and the poor, in ways that make it harder for them to vote, or for their votes to count.

A close examination of the Houston Votes case reveals the consequences when an elected official pursues hotly contested allegations of election fraud.

The investigation was closed one year after the raid, with no charges filed. But for Houston Votes, the damage was done. Its funding dried up, and its efforts to register more low-income voters ended. Its records and office equipment never were returned. Instead, under a 2013 court order obtained by Abbott’s office, they were destroyed.