The plane is destroyed, a complete wreck: the pilot must have died on impact.

飞机被毁，完全成了一堆残骸：飞行员一定在撞击中丧生了。

《柯林斯英汉双解大词典》

Even if bacteria did arrive on Earth from Mars, they must have died out.

即使细菌真的从火星来到地球，它们也一定已经灭绝了。

youdao

He must have died twenty years ago by now.

他已经死了有20年了。

youdao

He must have died immediately.

VOA: special.2009.07.25

He must have died twenty years ago by now.

他已经死了有20年了

耶鲁公开课 - 金融市场课程节选

In it, he makes joke after joke about the girl's condition, saying she must have died because she didn't move during one assault.

CNN: Teen in Ohio video 'ashamed and embarrassed,' lawyer says

In the video, a teenager makes joke after joke about the girl's condition, saying she must have died because she didn't move during one assault.

CNN: Defense battles social media blizzard in Ohio rape case

The nonprofit organization requires that in order to be chosen for inclusion on the wall, the officer must have died in the course of duty and served directly for a governmental agency with the powers to arrest.

NPR: Police Memorial Wall Comes With Some Tough Calls