Authorities do not suspect foul play and the cause of his death was an enlarged heart.

With Graves's medical history, no one would likely suspect foul play.

The police do not suspect foul play and ask Ted to leave the hotel.

There is no reason whatever to suspect foul play, or to imagine that death could be from any but natural causes.

No sign of violence, but the police suspected foul play.

Ah, you think, then the authorities will immediately suspect foul play.

Police are investigating the death, but they don't suspect foul play.

I suspected foul play - murder, when all else had failed!

He suspects foul play, and his investigations lead him around various states of Europe.

The cause of death isn't yet known, but authorities don't suspect foul play.