NEW : Doctor was ` ` present during the search of his home , '' attorney says . Investigators search for Conrad Murray 's Las Vegas home , office . Murray allegedly gave Jackson propofol in the 24 hours before death , source says . Sources close to Jackson says doctor administered drug believed to have killed singer .
NEW : Doctor was `` present during the search of his home , '' attorney says . Investigators search Dr. Conrad Murray 's Las Vegas home , office . Murray allegedly gave Jackson propofol in the 24 hours before death , source says . Source close to family says doctor administered drug believed to have killed singer .