MIGRANT SUSPECT ARRESTED: SET NYC SUBWAY RIDER ON FIRE AND WATCHED HER BURN

A Guatemalan migrant was arrested after allegedly tossing a lit match on a sleeping woman in a Coney Island F train, then sitting across from her to watch the gruesome killing.

Police caught him after a witness spotted him riding another train near 34th Street.

Surveillance footage shows cops briefly talking to the suspect right after Sunday's 7:30 AM attack, but let him go—only realizing later he was the killer they sought.

The victim's clothes were completely burned off.

MTA worker:

"That's messed up—it's only three days until Christmas."