This law might or might not have prompted the parents of the Colorado killers to intervene before the massacre.

"We saw that we should be intervening before the age of 3."

The man strenuously denies following him and other men intervene in the discussion, before Quiller returns to his hotel.

"We need to step back and look at the entire ecosystem and ask, 'Is it possible to intervene before the crisis?' "

The central bank intervened at its usual time before noon to drain reserves from the banking system through three-day matched sales.

Discreetly, we refrained from our usual activities during the nights that intervened before the next full moon.

Finally she decided to intervene, before Ronnie burst himself overeating, or George had a stroke.

Two nights and a day intervene before our departure; this should be time enough.

Police intervened immediately before any confrontation with Hansen and found a shotgun in the individual's truck.

Even if we don't manage to intervene before the zenith, we've still got some time.