Editor's Note -- Updates to this story include clarification of information and correction of details provided in earlier updates to the original version which was published.

WASHINGTON (DC News Now) -- The third suspect in the murder of a Capitol Hill intern was arrested Wednesday, the Metropolitan Police Department announced.

Police said 18-year-old Naqwan Antonio Lucas was wanted for his involvement in two deadly shootings, and a $75,000 reward was offered for information leading to his arrest.

Investigators said Lucas and two 17-year-olds, Jailen Lucas and Kelvin Thomas Jr., were responsible for the June 30 killing of Eric Tarpinian-Jachym, 21. They were previously indicted by a grand jury.

Naqwan Lucas was arrested in Germantown, Md. on Wednesday and pleaded not guilty Thursday af

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