LOS ANGELES , California -LRB- CNN -RRB- -- Dr. Conrad Murray , the physician under investigation in the death of singer Michael Jackson , said in a video posted online Tuesday that he has `` faith the truth will prevail . '' In Dr. Conrad Murray 's video , posted on YouTube , he tells supporters he has been receiving their messages . Murray , who was with Jackson when he died , recorded the one-minute video in Houston , Texas , on Wednesday and it posted on YouTube Tuesday , the spokeswoman for his lawyer said . `` I have done all I could do , '' Murray said . `` I told the truth , and I have faith the truth will prevail . '' The video is the first public comment by Murray since Jackson 's June 25 death . `` I want to thank all of my patients and friends who have sent such kind e-mails , letters and messages to let me know of your support and prayers for me and my family , '' Murray said . Watch the statement from Jackson 's doctor '' `` Because of all that is going on , I am afraid to return phone calls or use my e-mail . Therefore , I recorded this video to let all of you know that I have been receiving your messages , '' he said . Murray , a cardiologist , owned and operated two medical clinics -- in Las Vegas , Nevada , and in Houston -- but he took a full-time job as Jackson 's personal doctor in May as the pop singer prepared for his comeback concerts scheduled to start in July . He was at Jackson 's Los Angeles home when the entertainer was found unconscious and rushed to a hospital . Investigators have searched Murray 's home and clinics for evidence related to the anesthetic propofol , according to documents filed in court . A source close to the investigation told CNN that Murray is believed to have administered the drug -- also known by the brand name Diprivan -- to Jackson within 24 hours of his death . Murray has been `` under siege '' by the media and targeted by death threats in recent weeks , according to the spokeswoman . `` I have not been able to thank you personally , which , as you know , is not normal for me , '' Murray said in the video . `` Your messages give me strength and courage and keep me going . They mean the world to me . Please , do n't worry . As long as I keep God in my heart and you in my life , I will be fine . ''