Dr. Ferdinand Mejilla, 50, was shot and killed at the Mejilla Chiropractic Clinic at 195 Plains Rd. E. just after noon on Thursday.
Police said the suspect, a former patient identified as David Williamson, suffered a self-inflicted gunshot wound in the incident.
Halton police Sgt. Barry Malciw told Global News on Monday no further information will be released on this case.
Authorities said in a media release last week that Mejilla was a father of five and that his family had requested privacy.