Two new AI tools are being developed to help in the search for the more than 134,000 people being sought.
Rosas' son, Diego, went missing at the age of 16 in the central town of Ecatepec in September 2015 after leaving his home to meet some friends.
Countries like the United States, India and China already use facial recognition and age progression software to search for kidnapped children.
The use of AI could be a game-changer, Rosas said, on learning about Regresa from AFP.
They also post photos of their missing loved ones in public spaces and urge criminal groups to provide anonymous tipoffs.