TMZ also recently spoke to Jeffrey Dahmer investigator Dennis Murphy ... who warned Smith could fall back into his murderous ways -- just like Dahmer, who vowed to kill and eat people again if he were ever released from prison ... before his own 1994 slaying behind bars.<br /><br />Talitha says she agrees with Dahmer's assessment, pointing out Smith will likely act out again. She tells us, "[The] only way to protect our society -- he should have been kept behind closed doors."
