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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 <br />