According to police, the two men got into a verbal altercation on the train which led to a physical altercation on the Bedford Avenue underground station platform.
Police say that when both men got off at the stop, the suspect initiated a physical altercation which resulted in both individuals falling on to the tracks at the crowded station last Friday night around 10 p.m.
Beauchamp, a homeless man, was able to climb back up on to the platform but Basin was struck by an oncoming Northbound L train. Basin was rushed to Bellevue hospital where he was later pronounced dead on arrival.
\Police are asking for the public’s assistance in locating Beauchamp, who is 33-years-old, has a thin build and dirty blonde hair, and pock marks on the right side of his face.
According to police, he was wearing brown pants, a black rain jacket and black sneakers.
Anyone with information is asked to call CrimeStoppers at 800-577-TIPS or text their tips to 274637 then entering TIP577.