In Louisiana, the district attorney generally has 60 days from the date of arrest to formally charge a person with a crime. This period is outlined in Louisiana Code of Criminal Procedure Article 701, which states:

"An arrested person who is not formally charged by bill of information within sixty days of arrest shall be released from custody, unless the delay is caused by the accused, or unless another delay is authorized by Article 707.1 or 708.1, or unless the accused is charged with a capital offense."

However, it's important to note that there can be exceptions and circumstances that may lead to delays in formal charging. These exceptions might include situations where the accused is involved in other legal proceedings, is facing additional charges, or if there are other complicating factors in the case. It's advisable to consult with an attorney for specific legal advice related to a particular case, as the application of the law can vary based on the specific details and circumstances involved.