Speculation had centered on her son as a suspect, particularly early in the case.

Speculation centered on his wife's potential claims to a share of a new contract with an American team.

Speculation has naturally centered on the master of the house.

No official cause was ever determined, but speculation centered upon a failure in the guy lines.

Speculation for the withdrawal centered on the Soviet team's professional status.

Speculation has centered on Edwards possibly running for governor in 2014.

While the effective date was not clear, speculation centered on several dates in July.

Further speculation centred on the financial state of the main Maxwell companies.

Still more speculation centered on the far right or the far left of Japanese political life.

Rather, his speculation centered on the significance of her being a Zivver.