[2] The bank records also list his service in the Union Army during the American Civil War in Company F of the 78th Regiment Infantry U.S.

[3][2] Poindexter was elected to the Louisiana State Senate in June 1868 as a Republican representing Assumption, Lafourche and St. Landry Parish's.

[2] In 1875 Governor William Pitt Kellogg appointed Poindexter to the position of supervisor of registration for Assumption Parish.

[2][7] While serving in the senate Poindexter introduced a number of bills relating to moral and family values such as the suppression of obscene publications and the outlawing of adultery and concubinage.

[2] The 1870 United States census lists him as running a ferry company, owing $500 of real estate and $5,000 in personal property.