Techniques and results are presented from a search for long-lived exotic particles in proton-proton collisions using data collected by the CMS experiment at CERN with a center-of-mass energy of √s = 13 TeV. The data, which were collected from 2016 to 2018, correspond to an integrated luminosity of 140 fb^-1. This search uses benchmark signal models where long-lived exotic particles are pair produced, with each decaying into two or more quarks, producing a signature of two displaced vertices. The analysis presented in this thesis is a continuation of previous searches for pairs of displaced vertices. Major developments include a new trigger scheme, allowing greater sensitivity to lower-mass long-lived particles, as well as refinements to vertex reconstruction and selection, a new search variable, and improved estimation of various systematic uncertainties. At the time of writing this thesis, the analysis remains blinded. However, expected limits show that this analysis can set strong exclusion limits, and sets stronger bounds than previous analyses for long-lived particles with masses around and below 600 GeV.