Complex sentence: Later proven he committed suicide to avoid capture at the end of World War II in Europe, and remains discovered in 1972 were conclusively proven to be Bormann by forensic tests on the skull in 1998.
Split into simpler sentences: Later proven he committed suicide to avoid capture at the end of World War II in Europe. Remains discovered in 1972 later conclusively proven to be Bormann by forensic tests on the skull in 1998.