[flotzam]

Brand new coins, but wouldn't they still look suspicious if the block's coinbase is outlandishly large?

[Taek]

Also you'd be able to see which transaction paid the large fee and what the history is.

Might go unnoticed if the original coins weren't suspicious, but if an investigator is already looking at the original transaction because they suspect it was involved in crime, this type of jump is unlikely to throw them off the trail.

[aqme28]

That used to be common before wallets got better. People would accidentally set the fee way too high every once in a while.