SAN ANTONIO Tuesday marks 30 years since 11-year-old Heidi Seeman disappeared on the citys North Side. 1990 kidnapping, murder of two San Antonio girls still unsolvedAt the time it was the largest search in FBI history. Weeks into the search, another little girl, 7-year-old Erica Botello, disappeared and the crews searching for Heidi joined the search for Erica. Then I got involved with the center itself, Tate said, speaking about the Heidi Search Center. The Heidi Search Center was created soon after and was named after Heidi Seeman.