Dyer, 28, was killed at the 200 block of E. Jarvis Street in Perris on June 28, according to authorities. Details of her murder have not been released.
Randy Tell Jr. is wanted for questioning as part of the murder investigation, Sheriff's said, though he remains at large. Tell was involved in a relationship with Dyer, and the two had children who were taken by Child Protective Services.
It is not known if Dyer's children were at home at the time of the murder, according to investigators.
Tell is described as 5 feet 4 inches tall and weighing 155 pounds. Anyone with information about his location is asked to call the Riverside Sheriff's Central Homicide Unite at (951) 955-2777.