Last May, Hoffman checked himself into a detox center for a heroin addiction and like so many other stars, including Robert Downey Jr., Lindsay Lohan and Charlie Sheen, he did it in the privacy of a drug treatment facility.
But what really happens inside these cozy and expensive clinics? And why is it that they've become so popular?
CNN's David Mattingly has the story OutFront.
New York (CNN) - Four people believed to be connected to the drugs found in Philip Seymour Hoffman's apartment were arrested late Tuesday night, law enforcement officials told CNN.
During the raid that led to the arrest of the three men and one woman, police recovered 350 small plastic bags of what is believed to be heroin, the officials said. The bags of alleged heroin were branded "black list" and "red bull" - not the same brands found in Hoffman's apartment, the sources said.
Apartments at 302 Mott Street in Manhattan, where the four were arrested, are part of the investigation into Hoffman's death, according to a police source.
The source identified the suspects being investigated in connection with drugs sold to Hoffman as Juliana Luchkiw, 22, charged with criminal use of drug paraphernalia, criminal possession of a controlled substance and unlawful possession of marijuana; Max Rosenblum, 22, charged with criminal use of drug paraphernalia, criminal possession of a controlled substance and unlawful possession of marijuana; Robert Vineberg, 57, charged with criminal possession of a controlled substance and criminal use of drug paraphernalia; and Thomas Cushman, 48, charged with criminal possession of a controlled substance.
The death of Philip Seymour Hoffman has raised new awareness to the growing heroin problem in the United States.
The number of people using heroin is rising dramatically across the United States and quickly becoming a national crisis.
Between 2002 and 2012 heroin use has jumped more than 100 percent nationwide and overdose deaths increased 55 percent from 2000 to 2010.
CNN's Deb Feyerick has more OutFront.
Was Justin Bieber flying high? Seriously, was he really smoking pot on his flight to New Jersey?
A law enforcement source tells CNN Justin Bieber and his father allegedly refused a pilot's warning to stop smoking pot during a flight from Canada to New Jersey on Friday.
Source: Justin Bieber, dad ignored pilot's demand to put pot away
The pilot also claims, according to the source, Bieber and his entourage were verbally abusive to the flight attendant.
CNN's Susan Candiotti is OutFront with the latest.
Authorities are piecing together the final hours of Philip Seymour Hoffman's life.
According to investigators, the Oscar winner withdrew $1,200 from a supermarket ATM near his New York city apartment hours before he was found dead from a suspected drug overdose.
A witness says he saw Hoffman withdrawing money and talking with two men who were wearing messenger bags the night before he was found dead of a suspected drug overdose.
Police are searching for anyone who could be linked to the drugs that may have killed Hoffman after he was found in his apartment Sunday with a needle in his arm.
Jason Carroll is OutFront with the latest.