After being clean for 23 years, actor Philip Seymour Hoffman had a serious relapse. Hoffman checked into a rehab after relapsing so bad that he began to use heroin. The actor began abusing prescription medication about a year ago before turning to heroin. Hoffman says that only one week following his heroin usage, he checked himself into a detox and rehab center. The Oscar winner was in the rehab center for 10 days before checking himself out. Hopefully he can stay clean and for good! Read more below.