Complex sentence: Krasovsky forsook any prospect of promotion and continued his investigation in spite of resistance and sabotage from the circles interested in railroading Beilis; he eventually refused to participate in the outright falsification of the case and was fired.
Split into simpler sentences: Krasovsky forsook any prospect of promotion and continued his investigation in spite of resistance and sabotage from the circles interested in railroading Beilis. Krasovsky eventually refused to participate in the outright falsification of the case and was fired.