Overview

The Lee Chun-jae serial murders, also widely known as the Hwaseong serial murders, represent one of the most notorious and shocking criminal cases in South Korean history. Between 1986 and 1991, a perpetrator committed at least 10 brutal rape-murders in the rural areas of Hwaseong (then Hwaseong County, Gyeonggi Province), primarily around Taean-eup. The crimes terrorized the region for years and remained unsolved for over three decades, becoming emblematic of South Korea's most infamous cold cases alongside the Frog Boys case and the Lee Hyung-ho kidnapping and murder.

The perpetrator, Lee Chun-jae (born January 31, 1963), was identified in 2019 through advanced DNA technology while already serving a life sentence for the 1994 murder of his sister-in-law. He eventually confessed to 14 murders (including all 10 Hwaseong cases and others), plus dozens of rapes and attempted rapes. Due to the expiration of the statute of limitations, he could not be prosecuted for these earlier crimes but remains imprisoned for life.

The case highlighted major flaws in 1980s South Korean policing, including coercive interrogations, lack of scientific forensics, and investigative tunnel vision. It also spurred significant improvements in DNA evidence handling and criminal databases.

Background and Details:

Lee Chun-jae, then aged 23 to 28, targeted women returning home late at night in isolated rural areas. He typically hid in fields or bushes, attacked victims with weapons (often knives), bound them with their own clothing (stockings, bras, socks, or underwear), gagged them, raped them, and strangled them, frequently using the victims' own garments. Victims ranged in age from 13 to 71 and came from varied backgrounds with no apparent connections.

The crimes occurred mostly within a small radius (about 3 km) in Hwaseong areas such as Taean-eup, Jeongnam-myeon, Paltan-myeon, and Dongtan-myeon. Lee often left semen at scenes, which later proved crucial for identification. Many bodies were discovered days later in fields, ditches, or near paths, with evidence degraded by weather.

Crime Period: September 15, 1986 – April 3, 1991 (main serial murders).
Arrest/Identification: DNA match in August 2019; confession in September/October 2019.
Conviction Status: Public interest charges dismissed due to statute of limitations (expired 2006). Lee remains incarcerated on the 1994 life sentence.

Preceding Crimes: 7 Serial Rapes (1986)

Before the murders escalated, Lee committed at least seven rapes in the same area (Hwaseong Taean-eup region). These involved threats with weapons, binding victims with their clothing or items like diapers or stockings, robbery, and repeated assaults. Details include:

• Feb 8, 1986: Company employee (20) raped and robbed after being threatened and bound.

• Mar 20, 1986: Victim (22) raped after being dragged to a field.

• Apr 3, 1986: Victim (27) robbed and raped.

• Apr 25, 1986: Restaurant worker (39) raped and robbed.

• May 8, 1986: Housewife (43) raped twice.

• May 14, 1986: Victim (48) robbed and raped.

• July 1986: Victim (19) raped.

These rapes shared modus operandi with the later murders, suggesting the same offender.

The 10 Serial Murders

1. Sep 15, 1986: Lee Wan-im (72) – Strangled by hand in a field. Semen negative.

2. Oct 20, 1986: Park Hyun-sook (26) – Strangled; semen detected. Returning from a blind date.

3. Dec 12, 1986: Kwon Jeong-bun (25) – Strangled with stocking; items used as gag and mask. Semen detected.

4. Dec 14, 1986: Lee Gye-sook (22) – Bound and strangled; umbrella used; semen (blood type inconclusive).

5. Jan 10, 1987: Hong Jin-yeong (18) – Bound, gagged with sock, strangled. Semen detected.

6. Jan 25, 1987: Park Eun-ju (29) – Strangled. Semen detected.

7. Sep 7, 1988: Ahn Gi-sun (54) – Bound, gagged, strangled. Semen detected.

8. Sep 16, 1988: Park Sang-hee (13) – Strangled in her home (initially ruled copycat; later confirmed as Lee's). This led to the wrongful conviction of Yoon Seong-yeo.

9. Nov 15, 1990: Kim Mi-jeong (14) – Brutally assaulted with objects, bound, gagged with bra, strangled. Semen (B-type reported). Occurred during blackout (dim-out) period.

10. Apr 3, 1991: Kwon Soon-sang (69) – Strangled. Footprints and semen (B-type reported).

Lee later confessed to additional murders outside the original 10, bringing confirmed totals to 14 murders and 9+ rapes, with many more claimed.

Investigation Process

Early investigations were hampered by:

• Political sensitivities (pre-1988 Olympics).

• Poor crime scene preservation (scenes sometimes burned).

• Lack of coordination and scientific methods.

• Focus on local suspects and coercive tactics rather than forensics.

Over 2 million police hours and 21,000+ suspects were involved. DNA testing was nascent globally and unavailable domestically. Samples sent to Japan were mishandled. A composite sketch (montage) was created after a 7th-incident bus sighting of a suspicious man with wet clothes. He was described as 20s, 165-170 cm, slim, soft hands, possibly B blood type (later disputed).

Identification and Confession (2019–2020)

In 2019, using improved residual DNA amplification, police matched evidence from multiple scenes to Lee Chun-jae, then 56 and serving life in Busan Prison for murdering his sister-in-law in Cheongju (1994). DNA from the 9th murder (and others) matched perfectly.

Lee initially denied involvement but confessed after interviews with profilers. He provided a handwritten list ("12+2" murders) and detailed knowledge only the perpetrator would have. He expressed surprise he wasn't caught earlier. Profilers used psychological tactics, building rapport.

In 2020, police confirmed 14 murders and 9 rapes. Lee testified in Yoon Seong-yeo's retrial, admitting the 8th murder.

The Yoon Seong-yeo Wrongful Conviction

Yoon Seong-yeo was convicted via coerced confession and flawed evidence for the 8th murder (Park Sang-hee, 13). He served ~20 years before release. In 2020, after Lee's confession and new evidence, Yoon was exonerated in retrial and awarded substantial compensation. This case exemplifies investigative abuses.

Controversies

• Blood Type Errors: Early reports suggested B-type semen, but Lee is O-type. Explanations include contamination, degradation, or testing inaccuracies common at the time.

• False Suspects and Abuses: Dozens (up to 41 prominent, thousands investigated) endured torture, beatings, sleep deprivation, and fabricated evidence. At least 4 suicides linked to this. Police later apologized.

• Community Reactions: Some villagers defended Lee or downplayed his crimes.

• Systemic Failures: Performance pressure under authoritarian-era policing led to miscarriages of justice.

Lee was not a sophisticated criminal but an opportunistic, low-intelligence offender who left evidence and was nearly caught multiple times. He had prior brushes with police but was released due to mismatches or lack of technology.

The case drove major reforms in forensic science, DNA databases (expanded post-2010), and human rights in investigations. It remains a cautionary tale about confirmation bias and the importance of evidence-based policing.

Related Cases: Lee confessed to additional crimes in Suwon, Cheongju, etc., including the 1989 Hwaseong elementary student disappearance and others.

Source: Namuwiki