Of course it's not true. The guy was obviously joking. Even if the feds were dumb enough to do this, they couldn't legally, because the legal process hasn't completed.
They had said as much earlier. Then again, I was amazed to learn that in my own country, the Netherlands, the government does regularly sell seized goods before the legal process has completed. If the defendants are acquitted, they get back the amount the government got when it sold their possessions. The government tends to do that for bulky goods, good with highly variable prices, or if the costs of safe storage make it worthwhile to sell. In the case I enquired about it was a bunch of BTC seized from FBTC Exchange, which they sold because it was so volatile. I called the public prosecutor's office, and they explained the policy to me.