Naperville Woman Found Guilty of Murdering Boyfriend in 2020

Rosa Lagrone, 40, convicted of killing Darnell Manns during an argument at her home

Feb. 6, 2026 at 8:07pm

A 40-year-old Naperville woman has been found guilty of murdering her boyfriend in 2020, according to the DuPage County State's Attorney's Office. Rosa Lagrone was convicted by a jury on Friday after a four-day trial for shooting and killing Darnell Manns during an argument at her home in November 2020.

Why it matters

This case highlights the tragic consequences of domestic violence and the need for greater awareness and resources to prevent such incidents. Lagrone's conviction sends a strong message that violence against intimate partners will not be tolerated.

The details

On November 6, 2020, Lagrone and Manns were at her home in unincorporated Naperville when they got into an argument about Manns dating another woman. The argument escalated, and Lagrone allegedly shot Manns in the arm and torso with a pistol. Manns was transported to a local hospital where he later died from his injuries. Lagrone was initially charged with attempted murder, aggravated battery with a firearm, and domestic battery, but was later indicted on five additional murder charges.

  • On November 6, 2020, Lagrone and Manns were at her home in the 0-100 block of 25W Keswick Lane in unincorporated Naperville around 2:16 p.m.
  • Lagrone allegedly shot Manns during the argument on November 6, 2020.
  • Manns later died from his injuries at the hospital.

The players

Rosa Lagrone

A 40-year-old Naperville woman who was found guilty of murdering her boyfriend, Darnell Manns, in 2020.

Darnell Manns

Lagrone's boyfriend who was shot and killed by Lagrone during an argument at her home in November 2020.

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What they’re saying

“While today's guilty verdict will not bring Darnell back to those who loved him, it does reveal the truth about what happened on November 6, 2020, and holds Rosa Lagrone accountable for the murder of Darnell Manns.”

— Robert Berlin, DuPage County State's Attorney

What’s next

Lagrone's next court appearance is scheduled for April 1, where she will be sentenced for the murder of Darnell Manns.

The takeaway

This tragic case underscores the need for greater awareness and resources to address domestic violence in our communities. Lagrone's conviction sends a strong message that violence against intimate partners will not be tolerated, and it is a step towards justice for Darnell Manns and his loved ones.