Jace Jamison lives with his maternal grandmother, who is his legal guardian. Oakland County sheriff's deputies said the grandmother let the boy's mother, DaJanaye Jamison, 22, have visitation with him Thursday.
The grandmother said DaJanaye Jamison, who is her daughter, got into a dark-colored truck driven by an unknown friend and left with Jace. The grandmother said she spoke with DaJanaye Jamison on the phone and she told her she was not bringing him back because he is her child.
Deputies said the grandmother is concerned because she learned DaJanaye Jamison was with a man believed to be Jace's biological father. Dorian Glenn, 24, spent time in jail for abusing the boy when he was 18 months old.
Authorities said custody was granted to DaJanaye Jamison's mother because she did not comply with court orders regarding his care.
Deputies have checked areas that DaJanaye Jamison is known to frequent. They have also spoken to her family members, but they have not found her or Jace.
Anyone with information is asked to call the sheriff's office at 248-858-4911.