who is liable in this situation?

a friend of mine buys and sells cellphones,

Yesterday a Japanese man approached me selling cellphones at a reasonably good price.

Thinking that this deal would benefit my friends business I called my friend and asked him if he might be interested in buying them. My friend was very interested and told me to get the guys details and facilitate a meeting for them. I facilitated a meeting for them for that same day.

They met at my house, I just supplied the venue they dealt with each other, my friend paid the man and the man gave him the goods, about 30 smartphones.

When the Japanese guy left my friend noticed that 25 boxes were empty, he was just conned.

My friend now holds me liable for getting him into contact with this person. I am afraid he is going to arrange people to threaten me etc, I am just as upset as he is for being conned and my wife is paranoid

who is liable , what can i do, he lost out on a lot of money

I am currently a nervous wreck, my heart wont stop pounding