Frank Spinosa, a former TD Bank executive accused of being ex-attorney Scott Rothstein's most helpful banker in his $1.2 billion Ponzi scheme, pleaded guilty Thursday to federal fraud conspiracy.

Spinosa, 54, faces up to five years in prison and a $250,000 fine at sentencing by U.S. District Judge Beth Bloom on Dec. 18.

Spinosa is the last of more than two dozen defendants to be convicted in the settlement financing scheme that caused the collapse of the 70-attorney Rothstein Rosenfeldt Adler labor and employment firm in Fort Lauderdale nearly six years ago.