The most probable methods used by the cybersecurity expert to get to this stage of the investigation are checking with CISCP and also investigating the dark web.
Cybersecurity can be defined as a preventive practice that is typically used for protecting computers, software programs, electronic devices, networks, servers and data from potential theft, attack, damage, or unauthorized access, especially through the use of technology, frameworks, security policies, processes and network engineers.
CISCP is an acronym for Cyber Information Sharing and Collaboration Program and it is a Homeland Security database that provides public-private information about threat actors or cyber attackers.
Dark web refers to a subset of the world wide web (WWW) that is intentionally encrypted from conventional web browsers and search engines for the purpose of illegitimate trading activities.
In conclusion, the most probable methods used by the cybersecurity expert to get to this stage of the investigation are checking with CISCP and also investigating the dark web.
Read more on cybersecurity here: https://brainly.com/question/14286078