After a two-month investigation in which undercover officers made drug purchases at 10 Kensington St., the New Haven Police Department’s Tactical Narcotics Unit issued a search warrant at the address Friday afternoon, City Hall spokeswoman Jessica Mayorga said in a press release. The search uncovered 11.9 grams of marijuana, 3 grams of crack cocaine, ecstasy and $1,366 in cash, she said. Tobias Greene was found by police in the bathroom flushing drugs down the toilet. Police arrested five people in the house.