Steve Foley writes:

The NTSB does not produce 'Special' reports on 'most pilots who kill
themselves'.

From NTSB/SS-05/01:

Accident, Incident, and Violation History

A review of the accident and incident history of study pilots indicated
that 19 percent of accident pilots had an accident or incident before the
study accident. In four of these cases, the event included in the study was
the pilot's third recorded mishap. In contrast, figure 14 shows that a smaller
proportion of pilots in the nonaccident control group were ever involved in an
accident or incident. The differences in accident and incident history between
groups was statistically significant, .2 (1, N = 207) = 3.99, p = .046, with a
larger percentage of accident pilots having been involved in a prior
occurrence.

In addition to accidents and incidents, FAA records indicated that 6 of the 72
study accident pilots had civil aviation violations on their records, in
contrast to only 3 of the 135 nonaccident pilots. The descriptive comparison
suggests that a higher percentage of accident pilots had violation records,
but because of the small numbers of all study pilots with violations,
statistical analyses were not conducted for these values.