There must be a reason why he is acting suspiciously. It's like the saying, 'Where there's smoke, there's fire.'

Rumors are spreading that he is the culprit, but there must be some reason because 'where there's smoke, there's fire.'

He lost everything.

He went outside without a jacket.

Please come to my place.

By the way, how was the party yesterday?

What is the reason he was late?

His behavior is truly outrageous.

His behavior is very suspicious.

He started to act immediately.