Sue Farenthold, 48, was charged with drug possession after methamphetamine and heroin was found in the house Monday, the Corpus Christi Caller-Times reported. She was released on bail.
The raid was carried out by Corpus Christi police, a SWAT team and U.S. marshals, officials said. Investigators had received a tip that drugs and a known gang member were at the house, KRIS-TV, Corpus Christi, reported.
Police used tear gas when those inside the house refused to respond to a demand that they come out.
Three men, Jesus Juarez, 38, Michael Wayne, 49, and Johnny Reynolds, 40, were also arrested, and remained behind bars Tuesday in lieu of $5,000 bail, the Caller-Gazette reported.
Farenthold, a conservative who represents the Brownsville-Corpus Christi area, released a statement: "I am saddened to learn the terrible news of the situation unfolding around my sister. Tragedy has occurred in my family in the past, and I am saddened it has happened again. I trust that law enforcement officials are doing their job and I support them carrying out their duty, regardless of where it takes them. I love my sister and ask for your prayers for her and the rest of my family as we work through this very difficult time."