In 2002, Tsakopoulos purchased a 70,000 volume collection on Hellenistic civilization and donated it to the library of California State University, Sacramento where it is available for use by the community.

He arrived in United States with his family in 1951, eventually settling in Sacramento, California after having lived in New York City and the Chicago, Illinois area.

[6] His other daughter, Chrysa (Chrysanthy Panagiota) Tsakopoulos, married George Demos, a former United States Securities and Exchange Commission prosecutor and Congressional candidate.

"The case grew out of Tsakopoulos' preparations to subdivide part of the 8,350 acres (3,380 hectares) Borden Ranch into apple orchards and vineyards.

"But Tsakopoulos argued that normal farming practices, including deep plowing, were excluded specifically from the Clean Water Act.