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Case Description

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Kathleen Mohn, a 48-year-old woman from Upper Merion Township, Pennsylvania, was last seen on December 3, 1999. Kathleen was supposed to leave her home around 9:00 p.m. to visit her boyfriend, Robert Linder, in Levittown, a trip she regularly made over weekends. However, she never arrived, and her estranged husband, Dr. Thomas Mohn, reported her missing after Linder called to inquire about her whereabouts.

Kathleen and Thomas, though still living together, were estranged and openly seei ...Read More
Last Seen: Dec 03, 1999

Victim Details

Apr 27, 2010

Jan 06, 2021

Kathleen

Mohn

72

48

60 inches

62 inches

120 lbs

130 lbs

White / Caucasian

Female

On a cold December evening in 1999, 48-year-old Kathleen Mohn vanished from her life in King of Prussia, Pennsylvania. She was a woman navigating a period of significant personal change, living under the same roof as her estranged husband of over two decades, Dr. Thomas Mohn, while also finding new companionship. On the evening of December 3rd, Kathleen was preparing to drive to Levittown to spend the weekend with her boyfriend, a trip she had made frequently in the preceding months. She had considered staying home to wrap Christmas presents but ultimately decided to bring them with her. Her husband later reported to police that she left their home around 9:00 p.m.; however, she never arrived at her destination and was never heard from again. Days turned into a week with no word from Kathleen. The growing concern of her loved ones prompted a search that led to a grim discovery on December 13th. Her green 1993 Ford Explorer was found abandoned in the parking lot of a Kentucky Fried Chicken in Tullytown, Pennsylvania, not far from her boyfriend's home. An employee at the restaurant recalled the vehicle being parked there since at least December 5th. Inside the SUV were her eyeglasses, purse, cigarettes, and prescription medication, but her wallet and the Christmas gifts she planned to wrap were missing. The state of the vehicle was unsettlingly clean, a stark contrast to its usually cluttered condition. The driver's seat was pushed back, seemingly adjusted for someone much taller than Kathleen, and the air was thick with the scent of multiple air fresheners, which she was known not to use. Adding to the ominous scene, a cadaver dog later indicated the scent of human remains within the passenger compartment of the vehicle. The investigation into Kathleen's disappearance quickly focused on her personal life. She and her husband, though sharing a home, were leading separate lives and were both involved with other people. Kathleen had recently consulted a divorce attorney and learned she was entitled to a significant portion of her husband's dental practice and substantial monthly support payments. While her boyfriend was quickly cleared of any involvement in her disappearance, investigators have long considered her husband a person of interest in the case. He has maintained his innocence and has not cooperated fully with the police investigation. Despite the passage of time and the lingering questions, Kathleen Mohn's case remains an open and unresolved investigation, a painful void for a family still seeking answers and justice for a woman who is believed to have met with foul play.

Dec 03, 1999

King of Prussia

Pennsylvania

Montgomery County

19406

No

8450

Upper Merion Township Police

King of Prussia

Pennsylvania

Montgomery County

19406

Richard Gehman

Detective

175 West Valley Forge Road, Pennsylvania

6102653232

Local

Law Enforcement

9926080

1999-12-05

Upper Merion Township Police

Brown

Brown

Brown

No

05/30/2026


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