Mexico’s most prominent human rights lawyers, journalists and anti-corruption activists have been targeted by advanced spyware sold to the Mexican government on the condition that it be used only to investigate criminals and terrorists.

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.