"The investigators are now theorizing that he was the bomber."

Investigators theorized that the same person was responsible for the bombs and the letters.

Investigators had theorized that the first shooting was on Oct. 2.

Investigators theorized that the assailant might be someone the officer had arrested.

The investigators theorized that the time of the killings had not been coincidental.

Investigators have theorized that the two groups of bombs were built by the same bomb-maker.

A police official who spoke on the condition of anonymity said investigators theorized the victims were not chosen at random.

Investigators originally theorized that Ricardo thought all big trucks carried toys.

Investigators theorized that the thief walked out with the painting hidden under a coat and then disappeared in the busy square.

Traces of a strong tranquilizer were found in a glass, therefore investigators theorize it was merely a robbery gone bad.