Northwood is a residential subdivision in Irvine whose growth records the transformation of old ranch and orchard land into suburbia. Its new, uniform homes offered residents the promise of settled middle-class life, but the community also became the setting for two unsolved killings years apart: Manuela Witthuhn was murdered in her home, and Janelle Cruz was later found dead in her family’s house. Their proximity within the same subdivision gave the crimes a connection that investigators did not recognize at first.

From Orange Groves to Suburbia

Northwood emerged as development pushed into what remained of the old Irvine ranch. Orange groves still bordered the spreading concrete and asphalt, with orderly rows of trees, a packinghouse, and a camp for agricultural pickers marking the older landscape. The shift could be heard in the changing balance between cement trucks and tractors: construction noise increasingly drowned out the sounds of farming.

The eucalyptus trees planted by farmers in the 1940s to shelter the land from Santa Ana winds were incorporated into the new plan rather than removed. Developers used them to divide major roads and screen residential areas, lending the expanding suburb a green, established appearance even as construction advanced around it. The landscape retained traces of its agricultural past while being reorganized for housing.

Shady Hollow and Domestic Life

David and Manuela Witthuhn moved into Shady Hollow in late 1979, when their newly built house was finished. The subdivision contained 137 homes offered in four floor plans. The couple chose Plan 6014, called The Willow: a single-story, three-bedroom house measuring 1,523 square feet.

The newness of the house was part of its appeal. Its kitchen cabinets had seen little use, and the refrigerator still smelled of plastic. A spare bedroom held bicycles; another held David’s guitar. The home was spacious compared with the crowded house in which David and his brother Drew had grown up. For Drew, the house and the couple’s steady employment represented an adult stability he envied. Their conversations about front-yard brickwork and quality rugs made the home seem like a promise of a life still being furnished.

The Murders and the Neighborhood’s Similarity

The house at 35 Columbus stood in Northwood, in a subdivision where one single-story home could look much like another. Manuela Witthuhn was murdered in her bedroom in 1981. The crime remained unsolved, and the ordinary suburban setting did not immediately yield an obvious connection to later cases.

In 1986, eighteen-year-old Janelle Cruz was murdered in her family’s home at 13 Encina, also in Northwood. Her house was described as virtually indistinguishable from many others in the community, including the Witthuhns’ home. The account places the Cruz house a mile from 35 Columbus, while its discussion of the two victims’ homes gives the distance as two miles. Both descriptions establish that the homes were close within the same subdivision.

A Connection Revealed Later

No one had initially proposed that Cruz’s killing was connected to the murders of Manuela Witthuhn and Patty Harrington. Cruz was younger, and more than five years separated her death from the earlier killings. The shared location did not, by itself, overcome those differences or bring the cases together.

In 1996, Mary Hong reviewed a spreadsheet of unsolved cases with successfully developed DNA profiles. She already knew that the Harrington and Witthuhn profiles matched. While checking the chart, she recognized that Cruz’s profile matched them as well. Northwood’s significance thus changed from a setting shared by separate investigations into a geographic clue accompanying a forensic link: three victims’ cases were connected despite the gap in time and the differences that had once made Cruz seem unrelated.