Cross-Chain Crypto Crime: Investigators Face Growing Complexity

Crypto investigations are becoming increasingly complex as illicit activity spreads across multiple blockchains. According to Elliptic's research, over USD 21 billion in illicit and high-risk activity was routed through cross-chain services by May 2025, approximately triple its 2023 estimate.

This challenge arises because different blockchains maintain separate transaction records and use different technical structures. Investigators must connect the originating event with its destination, rather than assuming both appear in one ledger.

A new study introduced SolTracer, a proposed method for matching transfers into Solana despite differences in execution structure. Researchers reported a 20.16% improvement in F1 score over their strongest comparison method under one experimental setting.