Chris Benoit's doctorwas charged Monday withimproperly dispensing drugs aspart ofan investigation relatedto the murder-suicide of the Canadian pro wrestler and his family last month.

The seven-count indictment says Dr. Phil Astin dispensed drugs including Percocet, Xanax, Lorcet and Vicoprofen between April 2004 and September 2005. Astin surrendered toauthorities in Atlanta earlier in the day.

Federal drug agents have taken over the probe into whether Astin improperly prescribed testosterone and other drugs to Benoit.

Investigators concluded Benoitstrangled his 43-year-old wife Nancy and smotheredtheirseven-year-old son Daniel before hanging himself in the weight room of his house in Fayette County, just outside of Atlanta.

Authorities are investigating whether steroids may have been a factor in the deaths. Steroid abuse has been linked to angry outbursts known as 'roid rage.

Federal drug agents have taken over the probe into whether Astin improperly prescribed testosterone and other drugs to Benoit before he killed his wife and son, and committed suicide in the family's suburban Atlanta home late last month.

Investigators have conducted two raids at Astin's west Georgia office since last week.

World Wrestling Entertainment (WWE), the organization under which Benoit competed, claimed in a statementlast weekthat steroids were not related to Benoit's death, and could not be.

The Montreal-born Benoit began his career in 1985 after training with Stu Hart and Hart's family in Calgary.

He maintained a home in the Atlanta area from the time he wrestled for the now-defunct World Championship Wrestling.