The targets include lawyers looking into the mass disappearance of 43 students, a highly respected academic who helped write anti-corruption legislation, two of Mexico’s most influential journalists and an American representing victims of sexual abuse by the police. The spying even swept up family members, including a teenage boy.

Since 2011, at least three Mexican federal agencies have purchased about $80 million worth of spyware created by an Israeli cyberarms manufacturer. The software, known as Pegasus, infiltrates smartphones to monitor every detail of a person’s cellular life — calls, texts, email, contacts and calendars. It can even use the microphone and camera on phones for surveillance, turning a target’s smartphone into a personal bug.