Others say it was Duncan as well , but with respect to you but what is both of them has nothing to do with the murders of The Short's ? Luckily Ralph got arrested and Duncan too but I got a feeling they might not know this murders or was it to protect their secret or just told the truth .
You may be interested in this here is a link to an article or blog about another possible suspect in the Short Family Murders and it mentions the Michaela Garecht case in California. Interesting on how people have different theories:
Will There Ever Be Justice For Jennifer Short and Her Family? ~True Crime Diva