Baltimore police have arrested a man in the shooting that took the life of spokesman T.J. Smith's brother.

Terrell Gibson, 21, was arrested Thursday morning at his home in the 1800 block of West Lafayette Avenue. No gun has yet been recovered.

"We have not yet recovered the gun Terrell Gibson used to shoot and kill Dion Smith, but we have operations that are pending and we hope to recover that firearm that he used to kill Dion," Davis said.

Investigators are still trying to identify a motive. The two knew each other, Davis said.

"As far as motive goes, I can't go beyond dispute because we're just not solid yet on what happened inside that rowhome," Davis said.

He faces charges including first-degree murder in the Sunday killing of 24-year-old Dionay Smith at the victim's home in Upton. Police say detectives obtained video footage that helped them to identify Gibson.

His brother released a statement on behalf of his family:

"On behalf of the Smith family, I would like to offer our sincere thanks to the Baltimore Police Department for identifying and arresting the suspect responsible for our loved one's death.
"We also offer our thanks to the community for the outpouring of assistance and condolences.
"We now look forward to the justice system holding this individual accountable for his actions, so that he does not have the opportunity to harm anyone else's family."

In a Facebook post revealing that the victim was his brother, T.J. Smith wrote that his brother was hard-working, held down two jobs and helped out at the Kids Safe Zone.