Relisha went missing Thursday, the same day Kahil Malik Tatum, 51, allegedly beat to death his wife, Andrea Denise Tatum, 51, in an Oxon Hill, Md., motel.
Kahil Malik Tatum worked at the homeless shelter where Relisha and her mother and stepfather had been living.
Relisha's stepfather, Antonio Wheeler, expressed concern about the young girl possibly being with a man suspected of homicide, WUSA-TV, Washington, D.C., reported.
"I have no idea where she is. No idea," Wheeler said. "Just bring my daughter home. That's all I want, just bring my daughter home."