Columbia, SC (WLTX, AP) - The family of 18-month-old Amir Jennings, a Columbia child who hasn't been seen since late November, made a plea for his return Friday.

His grandmother, Jocelyn Jennings Nelson, and other family members spoke to reporters alongside Columbia Police Chief Randy Scott.

"My family and I are requesting your support in helping us to find his location to bring him home," Jennings Nelson said.

Police say the child was last seen with his mother, 22-year-old Zinah Jennings, around Thanksgiving. She was seen again in Columbia on December 24 when she was involved in a car crash. When investigators asked her where the child was, police say the 22-year-old first told them she did not have a child, according to arrest warrants obtained by the Associated Press.

Officers say they were given conflicting reports from the mother, who told them that she thought Amir was in Atlanta. Zinah Jennings was charged with unlawful conduct toward a child.

Friday, Jennings Nelson said she reported Amir missing on December 8th. She says she knows her daughter has ties to the Atlanta and Charlotte area, and believes it's possible the child could have been seen in those cities.

"I'm fearful," said Scott. "I will tell you I'm concerned. I'm not willing to say until we have proof that something has happened drastically to Amir."

Thursday, police used cadaver dogs to search the grandmother's home in Columbia, but have not said if that search yielded any information.

Scott said they're looking for any tips to find out what's become of the child.

"No bit of information is too small at this point," Scott said.

Clearly emotional as she talked to reporters, Jennings Nelson described Amir as a "happy child" who likes listening to songs and nursery rhymes, and said he answers to the names "Mir-Mir" and "AJ."

"We'd like to just ask for your continued support and prayers," she said.

Anyone with information should call Crimestoppers at 1-888-CRIME-SC, or e-mail a tip in to Crimestoppers of the Midlands. You can also text information in by texting "TIPSC" plus your message to CRIMES (274637). Either way you choose, your identity will remain anonymous, and you could be eligible for a cash reward.