It might have been nothing, but he had to investigate the possibility.

"The only thing I can say is we're investigating the possibility of them working together," he said.

Local government officials are also planning to investigate the possibility.

"We had to investigate the possibility that he was right," she said.

The man claims he is a police officer, investigating the possibility the woman has killed her own family.

Officials said they were investigating the possibility of weather as a factor.

The police said they were investigating the possibility that he had jumped.

The police said they were investigating the possibility of arson.

The authorities said they were investigating the possibility of a conspiracy.

I'm investigating the possibility that the senator's death is connected to another case on which I am primary.