Over the next several months, the court papers said, the investigators observed the couple making numerous other pickups and deliveries.

After that, the investigators observed the Morgans from a parked car.

General Kostelnik spoke to reporters at the space agency's headquarters here while the primary investigators were observing a day of remembrance for the seven astronauts.

The investigators observed modest statistically significant elevations in relative risk (ranging from 1.19-1.25) for each of the four haplotypes.

Other investigators have observed right lateralization for facial recognition in previous electrophysiological and imaging studies.

"It is simple enough, my boy," observed the senior investigator, stroking his grey, pointed beard.

But investigators observed occasional infighting during their yearlong investigation.

But investigators later observed them doing those things, he said.

In an observational study, the investigators observe the subjects and measure their outcomes.

In observational studies, the investigators only observe associations (correlations) between the treatments experienced by participants and their health status or diseases.