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Story summary
- Luigi Mangione, accused of killing UnitedHealthcare CEO Brian Thompson, appeared in court.
- Mangione's defense argues police illegally searched his backpack containing a 3D-printed gun and manifesto writings.
- The prosecution says the items link Mangione to the crime.
- A corrections officer testified about Mangione's media comments and Ted Kaczynski comparisons.
- Mangione still faces nine charges including murder and more testimony is planned.
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