The son of a refinery operator, Briscoe grew up in a working class home in Deer Park where he was taught the value of hard work and a strong commitment to his family and community. A graduate of Deer Park High School, Briscoe attended San Jacinto College. He then went on to earn a Bachelor's Degree from the University of Houston-Downtown and a Doctorate of Jurisprudence from South Texas College of Law. Currently, Briscoe owns and operates the Law Office of Briscoe Cain, PLLC and serves the State of Texas as a Captain in the Texas State Guard.

Briscoe has a record of defending the unborn, religious liberty, and election integrity and his advocacy has made headline news.

In December of 2015, Briscoe successfully defended the religious rights of Beaumont Police Officers when the City of Beaumont banned them from having a Bible study on their lunch break. In 2016, he released invoices exposing four Texas Medical Schools for using tax dollars to purchase aborted fetal tissue. Briscoe has been a delegate to six Texas GOP conventions dating back to 2010 and in 2020 he served as a presidential elector.

As the State Representative of House District 128, Briscoe has carried those same values with him to Austin. He has consistently received high legislative ratings from organizations like the National Federation of Independent Business, National Rifle Association, Texas Right to Life, Young Conservatives of Texas, and other conservative groups.

Briscoe currently serves as Chair of the Texas House Agriculture & Livestock Committee and as a member of the Insurance Committee. Previously, Briscoe served as Chair of the Elections Committee and as Chair of the Select Committee on Driver's License Issuance and Renewal. He has also served on the Committees on International Relations & Economic Development, Defense & Veteran Affairs, and Juvenile Justice & Family Issues. In 2021, Briscoe authored and passed legislation making it illegal for social media companies to ban users for their political viewpoints.

Briscoe also serves as a member of the Windstorm Insurance Legislative Funding and Funding Structure Oversight Board, a legislative oversight board that is tasked with, among other things, overseeing the Texas Windstorm Insurance Association's funding.

Briscoe and his wife Bergundi have five sons and reside in Deer Park. The Cains are members of Faith Family Church in Baytown where Bergundi serves on the worship team.