SAN ANTONIO For the first time in three months, Bexar County is summoning residents for jury duty. They are for grand jury service, not the petit jury service most people typically receive. Were going to use a grand jury process as sort of a test run before we actually bring in any jurors for jury trials, Local Administrative Judge Ron Rangel said. Civil district courts in Bexar County prepare to reopen after months-long closureBexar County courtrooms soon to have new lookRangel said those type summons would not be sent out until September when jury trials are expected to resume. Of the 320 summons sent, Rangel said that he expects about 80 people will serve.