Jane Doe Knows His Name
The Jane Doe Files, Part 4 of 6
The rapist of public imagination is a stranger: a man in a parking garage, a figure through a window. Most women know better. Roughly four in five rape victims know the man who raped them, and the evidence from the rape kit backlog suggests that the man she knows may well have done it before.
Who rapes
The numbers are consistent across every major source:
- Of women who have been raped, the CDC’s national survey found 56% were raped by an acquaintance and 39% by an intimate partner. 12% were raped by a stranger (totals exceed 100% because some women were raped more than once, by different men) (CDC NISVS).
- The federal crime victimization survey puts it at 78% known to the victim: 38% friends or acquaintances, 34% intimate partners, 6% relatives (BJS).
- Police data say the same. In roughly 590,000 rapes reported to police from September 2021 to 2026 in the FBI’s national incident data, where the relationship was recorded, only 9% of offenders were strangers. 68% of the assaults took place in a home, and 83% involved no weapon beyond the attacker’s own body; firearms appeared in under 2% (FBI Crime Data Explorer).
This is the fact that makes DNA so limited in ordinary rape cases (Part 1). When she knows his name, nobody needs a lab to identify him. The fight is over consent, and research on charging decisions finds that it’s precisely in acquaintance and partner cases that prosecutors start weighing the victim’s character and behavior. In stranger cases they mostly don’t (Spohn & Holleran, 2001).
The myth of two kinds of rapist
We tend to imagine two separate species: the predatory stranger who rapes again and again, and the “date rapist” who made one terrible mistake at a party. The kit backlog tested that idea.
When Case Western Reserve University researchers followed the serial offenders identified through Cleveland’s untested kits, they found that more than a quarter (28%) had raped both strangers and women they knew. All told, about 43% of the serial offenders had at least one victim they knew (SAKI research slides; Lovell et al., 2017). The researchers believe even that undercounts the overlap, because their sample leaned toward stranger cases. One offender in their data assaulted a friend, a neighbor and a relative.
Their summary: these men were “more about opportunity than maintaining a method.” Some were extremely violent; one apologized throughout the assault (Case Western). The neat categories, the stranger in the bushes and the guy at the party, are sometimes the same man on different nights.
To be fair to the data: in Detroit’s 894-kit study, kits from stranger rapes produced significantly more links to other sexual assaults than kits from acquaintance rapes (51 serial hits versus 18). But acquaintance kits produced database matches at the same overall rate, and the researchers concluded the results “do not support” testing stranger kits first (Campbell et al., 2016).
How many are repeat offenders? A real scientific fight
The most famous number in this debate comes from psychologist David Lisak. In 2002, he and Paul Miller surveyed 1,882 men at a Boston university. 120 of them described acts that met the legal definition of rape or attempted rape, against women they knew, usually incapacitated by alcohol or drugs. Of those 120, 76 (63%) were repeat offenders, averaging nearly six rapes each, and they accounted for 91% of the rapes reported (Lisak & Miller, 2002). None had ever been prosecuted.
That finding shaped a decade of campus policy, including a White House task force report. Then, in 2015, Kevin Swartout and colleagues tracked 1,642 college men over time in JAMA Pediatrics. They found that most college men who committed rape, about 73%, did so in only one academic year, and called an exclusive focus on serial predators “misguided” (Swartout et al., 2015).
Lisak and colleagues fired back, arguing Swartout’s method undercounted repeat offenders. JAMA’s statisticians re-reviewed the paper and let it stand, and a university inquiry found no misconduct (Retraction Watch).
The honest reading: some meaningful share of acquaintance rapists are repeat offenders, and a separate group offends once or briefly. Both matter. Prevention can’t only hunt predators, and investigation can’t assume every acquaintance rape is a one-time misunderstanding.
Why her kit might matter for someone else
This is where DNA comes back in.
In a single acquaintance case, DNA proves almost nothing that’s in dispute. He says it was consensual; the swab confirms they had sex. Case over, practically speaking.
Normally, a jury isn’t allowed to hear about other crimes a defendant may have committed; the trial is supposed to be about this one. Sexual assault is an exception in federal court and some states. Under Federal Rule of Evidence 413, prosecutors can tell the jury about other sexual assaults the defendant committed. That’s where a database match matters. If his DNA links him to an assault on another woman, her case is no longer her word against his. It’s his word against two women’s.
That power has limits, and the most famous recent cases show them. New York’s highest court overturned Harvey Weinstein’s 2020 conviction in 2024, ruling that testimony from women about uncharged prior acts should not have been admitted (NYSBA). His 2025 retrial still produced a conviction on one count (Court TV). How much a pattern can be shown to a jury depends heavily on where the case is tried.
Why she doesn’t report
Knowing him also shapes whether the case ever begins. Only about a third of rapes and sexual assaults reach police, though the annual figure swings widely (BJS). The most common reasons victims give point straight back to the relationship: fear of reprisal, calling it a personal matter, not wanting to get him in trouble. Older federal data found about three-quarters of rapes by current or former partners went unreported (BJS).
Which is why the most important number in this post may be the one we can’t see. The men women know are the men least likely to be reported, least likely to be charged, and, for some share of them, most likely to do it again.
Next in the series, Part 5: Jane Doe, Unlocked. What happened when England asked rape complainants for their phones.
Research and drafting assistance for this piece, including source verification, was provided by Claude (Anthropic). All claims are cited to primary or secondary sources linked inline throughout; the analysis and opinions are my own.