The family of ‘Walking Dead’ actor Moses J. Moseley does not think he committed suicide … they believe he was kidnapped and murdered.

Moses’ sister, Teerea Kimbro, tells TMZ … everyone who was close to Moses knew he loved life and she believes with all her heart he was kidnapped and then killed 3 days later.

We broke the story … law enforcement sources told us Moses’ body was found in Georgia Wednesday and cops were investigating his death as a possible suicide.

But, Moses’ sister says he’d booked a taping for the Monday before his body was found but never showed up … something she says he would never do. She went on to say he loved where his career was heading and they were planning big things in the near future.

Cops say they found Moses’ body in his car with the doors locked, a gun in his lap and a facial bullet wound.

His sister says investigators told her the gun in question was one of hers — she says she and Moses liked to go to the gun range and that he had a license to carry.

The family says cops told them they’re looking at possible foul play, and Henry County Police Captain Randy Lee tells TMZ … “It is being investigated as a possible suicide, however, detectives are following any and all available avenues and not ruling anything out.”