The person at the center of this case
Corinne June Groenenberg
Missing Person · Open
53 years waiting · since 1973
Missing Person: Corinne June Groenenberg
Justice for Corinne June Groenenberg — the trail went cold in 1973, but the truth hasn't.
Start here
Key leads to think about
🚗
vehicle
Lead #1What is the identity and current location of the male driver of the green or blue truck who picked up Corinne?
👁️
witness
Lead #2The family friend who followed Corinne to the highway may have additional details about the truck or driver—has this witness been fully interviewed?
🎯
suspect
Lead #3Was the truck driver ever identified or investigated as a person of interest?
Corinne June Groenenberg, a 16-year-old girl, disappeared on November 1, 1973, after leaving her home in Modesto, California and hitchhiking on the highway. A family friend witnessed her getting into a green or blue truck driven by an unknown male. More than 50 years later, her fate remains unknown, and investigators seek information about the truck driver and any witnesses to her disappearance.
Try asking
Claim this imported case
A one-time $10 claim transfers this imported case workspace to your account. You get 10 uploads for this case, 25 daily AI questions for this case, and public tips with files route to you.
10 uploads25 AI questions/day
This does not start a subscription. When the included limits are reached, the Personal plan unlocks more workspace capacity.
More leads to consider
Beyond the top three above — each detail below could be the thread that pulls this case open.
💡
clue
Lead #4Are there any records of similar disappearances or incidents involving hitchhikers in the Modesto area around 1973?
Have information about any of these leads?
Even the smallest detail could be the key to solving this case.
Official wording
Source Narrative
NamUs case MP4547. Missing person: Corinne June Groenenberg.
Last known contact: 1973-11-01 in Modesto, Stanislaus, CA. Circumstances: A family friend saw Groenenberg leave her home and followed her until she reached the highway and started to hitchhike.
She was last seen getting into a green or blue truck. The driver was male.
Demographics: 16 years, Female, White / Caucasian. Physical description: 5 ft 6 in, 115 lbs, hair: Brown, eyes: Blue.
Investigating agency: Modesto Police Department | 89016305.
Timeline of Events
👤
1973-11-01
Last Seen
Corinne left her home and was seen hitchhiking on the highway. A family friend witnessed her getting into a green or blue truck driven by a male.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:November 1, 1973
Last Updated:September 27, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 2095729500
You can remain anonymous
Leave a comment
Comments
Case Information
Incident:November 1, 1973
Last Updated:September 27, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 2095729500
You can remain anonymous