They gave preference to long-term investigations aimed at the leaders of large trafficking organizations.

"This is going to be a long-term investigation," he said.

Ms. Brennan, 46, heads the city's office of the special narcotics prosecutor, which conducts long-term investigations on the drug trade.

The objective is long-term investigation of temporal, climate or human impact.

Investigators said the fraud was uncovered as part of a long-term investigation in which thousands of accidents, some dating back years, were reviewed.

But this is a long-term investigation, and I won't be satisfied until we've done everything possible to solve this case.

Which was one of the fundamental problems with a long-term investigation.

The lawsuit remains unresolved because of several long-term investigations into a tangle of problems in corrections.

The Tandu are under long-term investigation for excessive genetic manipulation in making the two.

Serious and long-term investigations therefore became urgently necessary.