A man and woman were found shot to death Tuesday evening inside a Gloucester County apartment, investigators said. The two knew each other and it appears that they died in a “domestic situation,” Gloucester County Prosecutor’s Office Chief of Detectives Tom Gilbert told NJ Advance Media. The man and woman, who were not identified, were discovered inside an apartment in Clayton around 7 p.m., authorities said. Gilbert said the shooting was a “contained incident” and that there was no threat to the public. Their deaths remain under investigation by the office. Gilbert said he could not comment f…