Know anybody who suddenly turned bright red last Thursday?

The FBI is looking for a guy who held up a Santander Bank branch in Cambridge on March 9.

He's black, 5'8" and, at least for awhile on the 9th, was an unusual shade of red: "A red dye pack exploded on this individual immediately after he departed the bank."

Any info? Call Special Agent Brendan Fogarty at 857-386-2000.