298 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Diane Van Reeth Missing Person Case

Last seen in Tucson, Arizona on Aug 10, 1995

Victim Details

Created

Sep 27, 2016

Case Added

Jan 12, 2024

First Name

Diane

Last Name

Van Reeth

Current Age

Age At Disappearance

Height

67 inches

Weight

140 lbs

Ethnicity

White / Caucasian

Gender

Female

Last Seen

Aug 10, 1995

City

Tucson

State

Arizona

County

Pima County

Tribal Land

Agency ID

25239

Agency Name

Tucson Police Department

Agency City

Tucson

Agency State

Arizona

Agency County

Pima County

Agency Zip Code

85701

Agency Contact

Maria Cheek

Contact Job Title

Detective

Agency Address

270 South Stone Avenue, Arizona

Agency Phone

5207914444

Agency Jurisdiction

Local

Agency Type

Law Enforcement

Agency Website

https://www.tucsonaz.gov/police

Agency Case #

9508100532

Primary Agency

Tucson Police Department

Hair Color

Brown

Left Eye Color

Brown

Right Eye Color

Brown

Solved

Last Updated

Oct 3, 2026

Area Last Seen:

Case Description

Any updates on this case? Let us know!

Summary based on the NamUs case record (MP35452) and 6 other sources

On the morning of August 10, 1995, 35-year-old Diane Van Reeth left her home in Tucson, Arizona, intending to go to her job as a research coordinator at Tucson Electric Power. She was never seen or heard from again. Two days after she was last seen, her Ford Aerostar minivan was found abandoned in the 2800 block of east Fort Lowell Road. The keys were still inside the vehicle, but there were no signs of a struggle or any other evidence to suggest what might have happened to her. Authorities initially found no indication of foul play at the scene where the van was discovered.

The investigation into Diane's disappearance soon focused on her estranged husband, who was publicly known as Don Stecchi. Diane was in the process of divorcing him and was seeking custody of their two sons. Investigators discovered that 'Don Stecchi' was an alias for John Joseph Kalhauser, a man with a violent criminal past. He was wanted in Massachusetts for aggravated assault and attempted murder from a 1979 incident and had a previous conviction for manslaughter when he was a teenager. It is unclear if Diane was aware of her husband's true identity or his history. Shortly after Diane vanished, Kalhauser was extradited to Massachusetts to face the outstanding charges, for which he was sentenced to 29 years in prison.

Following Kalhauser's extradition, authorities classified Diane's case as a probable homicide. In 1999, Kalhauser pleaded no contest to the second-degree murder of his wife and received an additional 20-year sentence to be served concurrently with his time in Massachusetts. Despite the conviction, Diane's body has never been found. The case took another turn when investigators connected Kalhauser to another woman's death. When he was arrested in connection with Diane's disappearance, a photograph of a young woman was found in his wallet. In 2015, that woman was identified as Brenda Gerow, who had been missing since 1980 and whose unidentified body had been found in Pima County in 1981. While Kalhauser was a person of interest in Gerow's murder, the central mystery in Diane's case remains the location of her remains, leaving her loved ones without a final resolution. Her two children were ultimately adopted and raised by her cousin.
Last Seen: Aug 10, 1995

Links to Additional Sources (6)

See any mistakes? Let us know!

1449DFAZ - Diane Van Reeth - Doe Network

Diane K. Van Reeth - The Charley Project

Diane Van Reeth | International Missing Persons Wiki - Fandom

Diane Van Reeth

Diane Van Reeth - Newspapers.com™

AZ - Diane Van Reeth, 35, Winterhaven, 10 Aug 1995

Possible Unidentified Matches (1)

Unidentified remains cases whose details are consistent with this person, ranked by how closely they compare. Fields that are unknown in either case are left out of the score.

75%Possible

Jane Doe — Palm Desert, California

UP7026 • Found Feb 10, 1997

View case

Sex ✓Female

Age 100%Est. 35–50 vs 35 when missing

Race 100%White

Location 42%330 mi away

TimingFound 18 months after last seen

Height 100%5'6" vs 5'7"

Weight 100%145 lb vs 140 lb

Hair 100%Brown vs Brown

Eyes 60%Hazel vs Brown

These comparisons are generated automatically from public NamUs case data and are not confirmed identifications. Only DNA, dental or fingerprint comparison by investigators can confirm an identity. If you believe two cases are connected, contact the agency handling the unidentified case.

Unidentified photos are blurred because many are post-mortem. Tap a photo to reveal it.

Diane Van Reeth Missing Person Case

Last seen in Tucson, Arizona on Aug 10, 1995

Victim Details

Case Description

Links to Additional Sources (6)

Possible Unidentified Matches (1)

Latest News

Charges filed against activists who posed as Minnesota voters

Insane privileges for illegal-immigrant criminals: Letters to the Editor — Oct. 29, 2026

Body Found in Waterloo During Search For Edwin Geer

WALKING DEAD: CHRISTA PIKE FACING HANGMAN’S NOOSE?

MP of the week: Lisa Irwin

Tech stocks plunge amid AI concerns as $6.3 billion Binance hack raises security fears

Missing mom whose rotting body was found in shallow grave on NYC beach was shot repeatedly, may have known killer: cops, sources

Arrest Made After 87 Year Old Edwin Geer Found Buried in Waterloo

LINDSAY CLANCY CONFESSES, GRIPES “LACK OF SEX” IN GREEDY MONEY GRAB

Manhunt underway for escaped murderer in Tennessee

Forum Posts (1)

Other Missing Cases from Tucson, Arizona