Methodology
<br />3 -year followup period
<br />For analytic purposes, "3 years" was
<br />defined as 1,096 days from the day of
<br />release from prison. Any rearrest,
<br />reconviction, or re- imprisonment occur-
<br />ring after 1,096 days from the 1994
<br />State statutes, and when they were
<br />used they did not always conform to
<br />the study's definitions of them. In
<br />deciding which type of sex offender to
<br />classify the prisoner as, importance
<br />was attached not to the label the law
<br />gave to his conviction offense, but to
<br />statute the offender was imprisoned for
<br />violating, or the statute the released
<br />prisoner was charged with violating
<br />when he was rearrested for a sex
<br />crime. The former was obtained from
<br />the prison records assembled for the
<br />study; the latter, from the assembled
<br />release was not included. A conviction how well the law's definition of the arrest records
<br />after 1,096 days was not counted even offense fit the study's definition of the
<br />if it resulted from an arrest within the type.
<br />period.
<br />Separating sex offenders into four
<br />types
<br />The report gives statistics for four types
<br />of sex offenders. Separating sex offen-
<br />ders into the four types was done using
<br />information — in particular, the statute
<br />number for the imprisonment offense,
<br />the literal version of the statute, a
<br />numeric FBI code (called the "NCIC"
<br />code, short for "National Crime Infor-
<br />mation Center ") indicating what the
<br />imprisonment offense was, and miscel-
<br />laneous other information — available
<br />in the prison records on the 9,691 men.
<br />However, the prison records obtained
<br />for the study did not always contain all
<br />four pieces of information on the
<br />imprisonment offense. Moreover, the
<br />available offense information was not
<br />always detailed enough to reliably
<br />distinguish different types of sex
<br />offenders.
<br />The process of sorting sex offenders
<br />into different types involved first creat-
<br />ing the study's definitions of the four
<br />types, and then determining which
<br />State statute numbers, which literal
<br />versions of those statutes, and which
<br />NCIC codes conformed to the defini-
<br />tions. Each inmate was next classified
<br />into one of the types (or possibly into
<br />more than one type, since the four are
<br />not mutually exclusive) depending on
<br />whether the imprisonment offense
<br />information available on him fit the
<br />study's definition.
<br />An obstacle to classifying sex offenders
<br />into types was that the labels "rape,"
<br />"sexual assault," "child molestation,"
<br />"statutory rape" were not widely used in
<br />Sex offenders compared to non -sex
<br />offenders
<br />In 1994, prisons in 15 States released
<br />272,111 prisoners, representing
<br />two- thirds of all prisoners released in
<br />the United States that year. Among the
<br />272,111 were 262,420 released prison-
<br />ers whose imprisonment offense was
<br />not a sex offense. Non -sex offenders
<br />include inmates, both male and female,
<br />who were in prison for violent crimes
<br />(such as murder or robbery), property
<br />crimes (such as burglary or motor
<br />vehicle theft), drug crimes, and public
<br />order offenses. Like the 9,691 male
<br />sex offenders examined in this report,
<br />all non -sex offenders were serving
<br />prison terms of one year or more in
<br />State prison when they were released
<br />in 1994.
<br />At various places, this report compares
<br />9,691 released male sex offenders to
<br />262,420 released non -sex offenders.
<br />While labeled "non -sex offenders," the
<br />262,420 actually includes a small
<br />number- 87- who are sex offenders.
<br />The 87 are all the female sex offenders
<br />released from prisons in the 15 States
<br />in 1994.
<br />Ages of molested and allegedly
<br />molested children
<br />Information on the ages of molested
<br />children was needed for two calcula-
<br />tions: 1) age of the child the released
<br />sex offender was sent to prison for
<br />molesting, and 2) age of the child alleg-
<br />edly molested by the released sex
<br />offender during the 3 -year follow -up
<br />period. The most frequent source of
<br />both was a sex statute: either the sex
<br />None of the sex statutes was found to
<br />apply to a victim of a specific age; for
<br />example, just to 12- year -olds. But
<br />some were found to apply just to
<br />children in a certain age range; for
<br />example, under 12, or 13 to 15, or 16
<br />to 17. While specific ages of children
<br />could not be obtained from statutes,
<br />the availability of information on age
<br />ranges at least made it possible to
<br />obtain approximate ages. The rule that
<br />was adopted was to record the victim's
<br />(or alleged victim's) age as the upper
<br />limit of a statute's age range. To illus-
<br />trate, a statute might indicate that the
<br />complainant/victim be "at least 13 but
<br />less than 16 years of age." In that case,
<br />the age of the child was recorded as
<br />15, since the statute indicated the
<br />upper limit of the age range as any age
<br />"less than 16." As another example, if a
<br />statute indicated the complainant/
<br />victim be "under 12 years of age," the
<br />child's age was recorded as 11, as the
<br />phrasing of the age range did not
<br />include 12- year -olds, only those "under
<br />12." Because the victim (or alleged
<br />victim) was always assigned the age of
<br />the oldest person in the age range, the
<br />study made the victims (or alleged
<br />victims) appear older than they actually
<br />were.
<br />How missing data were handled in the
<br />report
<br />In many instances, the data needed to
<br />calculate a statistic were not available
<br />for all 9,691 released sex offenders.
<br />For example, the 9,691 were released
<br />in 15 States, but data needed to deter-
<br />mine the number reconvicted were only
<br />available for the 9,085 released in 14 of
<br />the 15. Of the 9,085, 2,180 (24 %) were
<br />reconvicted. When data were missing,
<br />the statistic was computed on those
<br />Recidivism of Sex Offenders Released from Prison in 1994 37
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