Dorien Oberlton had Eric Derrickson in his sights with no one there to help Derrickson, so Oberlton struck, police say.
And in Oberlton's mind, a years-long grudge against the man, who supposedly stole his girl, was settled, said family members of Derrickson.
Yesterday, authorities issued a warrant for Oberlton's arrest after several witnesses came forward to identify him in Tuesday's attack in an underground subway concourse, said Capt. Sharon Seaborough of Central Detectives.
Oberlton, 25, who's still on the loose, has no permanent address and should be considered dangerous, she said.
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