I believe it was in a Coinbase wallet.
Yeah it was a Coinbase account as was stated by the link below
https://cryptoslate.com/u-k-officials-have-frozen-nearly-7-7m-worth-of-illicit-crypto-assets-in-one-year/It seams the police force was given Authority to carry this freezing out?
Wouldn't innocent account be caught up in this mess( wouldn't be the first)
Despite all this illicit funds are still moved through traditional means than via Bitcoin or monero.
Side and unserious Note, maybe UK are trying to accumulate for a possible
reserve How can someone hold that kind of money in a centralised exchange? Not to be harsh, but the person typically got what he deserved.
Some people prefer ease to security.