A 911 caller on March 15 reported his father was being held against his will at a house in Houston, after initially being smuggled from Mexico to San Antonio.
Deputies located 22 illegal immigrants, three firearms and the five defendants.
Prosecutors say 32-year-old Anselmo Gonzalez-Mendoza, 26-year-old Epifanio Gonzalez-Mendoza and 20-year-old Leonel Gonzalez-Mendoza will be sentenced Oct. 16.
Two other relatives who earlier pleaded guilty, Agustin Gonzalez-Mendoza and Rogelio Gonzalez-Mendoza, will be sentenced later this summer.
The men could get up to 10 years in prison and $250,000 fines.
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