Veronica Aguirre, 26, claimed her husband was arrested groundlessly, telling AFP that under the state of emergency, "we cannot provide proof" of innocence.
But Jose Maria Tojeira, former director of the Central American University's Human Rights Institute, said El Salvador had "a strong tendency for generalized punishments which... are a source of violations of the law."
Bukele, 40, has likened El Salvador's gangs to "a metastasized cancer" and vowed there are only two paths for members: "prison or death."
For Jose Miguel Cruz, a researcher at the Florida International University, the only long-term solution was disarming and rehabilitating former gangsters and productively reintegrating them into society.