Feb 5, 2014 22:42 AP sources: Hoffman probe tip leads to 4 arrests AP sources: Hoffman probe tip leads to 4 arrests Associated Press photo by KEVORK DJANSEZIAN -- Philip Seymour Hoffman poses March 5, 2006, with the Oscar he won for best actor for his work in 'Capote' at the 78th Academy Awards, in Los Angeles. TOM HAYS| Associated Press Feb. 05, 2014 Comments NEW YORK — Four people are in custody on drug charges after police investigating the death of actor Philip Seymour Hoffman executed search warrants at three New York City apartments. Two people with knowledge of the investigation say a confidential source provided a tip that the suspects may have supplied Hoffman drugs. The people spoke to The Associated Press on condition of anonymity because investigators have not obtained evidence to corroborate the reported connection. Police say undisclosed quantities of heroin and marijuana were found Tuesday night. Hoffman was found dead Sunday with a syringe in his arm. The NYPD’s intensive effort to determine the source of the drugs in an apparent accidental overdose is unusual. Courts have found that under state law drug dealers cannot be held liable for a customer’s death.