Someone must be held accountable for the killings.

必须有人要对这些凶杀事件负责。

《牛津词典》

Those who abuse the system must be held accountable.

对于那些破坏该体系的人，必须追究其责任。

youdao

Those who perpetrated these crimes must be held accountable.

那些犯下这些罪行的人必须被绳之以法。

youdao

"If they put the pursuit of nuclear weapons ahead of regional stability and the security and opportunity of their own people, if they are oblivious to the dangers of escalating nuclear arms races in both East Asia and the Middle East, then they must be held accountable,"

VOA: standard.2009.09.23

"The Iranian government must now demonstrate through deeds its peaceful intentions or be held accountable to international standards and international law."

VOA: standard.2009.09.25

Any person complicit in the violation of that trust must be held accountable for their actions.

FORBES: Rutgers University Begins to Rebuild Public's Trust by Justly Firing Athletic Director Tim Pernetti

Those responsible must be held accountable and resign or be terminated for their actions.

NPR: AP Exclusive: IRS Knew Tea Party Targeted In 2011

These critics, particularly Members of Congress, must be held accountable for such destructive dissent.

CENTERFORSECURITYPOLICY: Treacherous "Agitation"