(CNN) -- Detectives searched the Houston, Texas, medical office of one of Michael Jackson's doctors on Wednesday for "evidence of the offense of manslaughter," the doctor's lawyer said. The search warrant at Dr. Conrad Murray's office "services part of the ongoing investigation into the death of Michael Jackson," Los Angeles Police Department spokesman Gus Villanueva said. Murray was the doctor who was at Jackson's home when the pop star died on June 25. Ed Chernoff, a Houston lawyer hired by Murray soon after Jackson's death, confirmed that Los Angeles Police detectives and federal Drug Enforcement Agency agents used a search warrant to enter Murray's office in northeast Houston on Wednesday morning, "The search warrant authorized law enforcement to search for and seize items, including documents, they believed constituted evidence of the offense of manslaughter," Chernoff said in a written statement Wednesday. Chernoff said members of Murray's legal team were at the medical office during the search, which he said was conducted by members of the DEA, two robbery-homicide detectives from the Los Angeles Police Department and Houston police officers. "Law enforcement concluded their search around 12:30 p.m., and left with a forensic image of a business computer hard drive and 21 documents. None of the documents taken had previously been requested by law enforcement or the L.A. coroner's office," Chernoff said. Tammy Kidd, a spokeswoman at Chernoff's office, told CNN the raid "was absolutely a surprise to us, because we've had open lines of communication this whole time." Source: CNN.com