Did some digging (I'm still digging)

The guy we are looking for went to Occidental college

Sohale Siddiqi is identified as "Sadik" in Obama's memoir, Dreams From My Father, and is described as "a short, well-built Pakistani" who smoked marijuana, snorted cocaine and liked to party. Siddiqi was from Karachi, Pakistan, and Obama's roommate when he attended Columbia University. Siddiqi was not a student at Columbia and became an illegal alien having over stay his tourist visa. [1] Obama knew Saddiqi when he visited Chandoo and Hamid at Occidental. Siddiqi claims Obama stopped using drugs when he arrived at Columbia. Siddiqi is a recovering drug addict and now lives in Seattle working for a community theater.

https:// en.metapedia.org/wiki/List_of_Barack_Obama%27s_friends_and_associates