A federal warrant has been issued for the man suspected of fatally shooting a three-year-old girl in a Landover, Md. home in early August.

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Devon Antwan Wallace (left) and three-year-old Knijah Bibb

Devon Antwan Wallace, 25, is charged with first-degree murder and other offenses in the Aug. 10 shooting. According to police, Wallace and another man got into an argument outside the home, and Wallace later returned with a gun and fired into the building, hitting three-year-old Knijah Bibb.

The FBI has joined the Prince George’s County police department to search for Wallace, who they believe may be hiding in the area of Washington, D.C., Richmond, Va., or Winston-Salem, N.C.

“We will arrest anyone who helps or harbors Wallace,” Prince George’s County Police Chief Mark Magaw said at a Sept. 5 news conference.

Digital billboards displaying Wallace’s face have been posted around the Washington, D.C. area. A full description of Wallace is available at: http://www.fbi.gov/wanted/murders/davon-antwan-wallace.

Authorities have added an additional $20,000 reward to the existing $25,000 reward for information leading to his arrest. Anyone with information in the case should call Prince George’s County Police Department’s Homicide Unit at 301-772-4925, Crime Solvers at 1-866-411-TIPS or the FBI at 1-800-CALL-FBI.  Callers can remain anonymous.

Last month, Prince George’s County police arrested another man in connection with Bibb’s murder on Aug. 13. Brian Ray Campbell, 24, of Landover, Md. was charged with first-degree murder and being an accessory before and after the fact. Police said Campbell provided the gun to Wallace and a ride for his escape. Campbell is being held without bond.