On Call Bio Services in Oakland, MD’s premier provider of cleaning and disinfection of crime scenes, homicides, natural unattended deaths, suicides, blood, infectious diseases such as COVID-19, and other bio-hazardous situations. If you are in need of Oakland crime scene or blood cleanup services contact us at 301-368-8110 for 24/7 discreet and compassionate assistance.


Biohazard situations including unattended death cleanup, blood spills, suicide cleanup and other traumatic scenes can be risky to the health of both your family and your home. On Call Bio’s team of professional and courteous crime scene cleaners have been handling crime scene cleanup and specialized sanitation services since 1996. We hope you will never have need of our services, but if you do, we are ready to remediate your situation 24 hours a day, 7 days a week.

We provide crime cleanup throughout Maryland 24/7/365.

We service neighborhoods in and around Oakland, MD including Dorchester, Cedonia, East Baltimore, Beechfield, Violetville, Ellicott City, Columbia, and all the surrounding areas.


If you or someone you know was a victim of a crime, On Call Bio has collected some resources to help guide you through this process.

Home Remodeling Services

Other Resources


“Aftermath was very professional and was able to accommodate the urgency in the situation. They explained the services and was able to relieve my worries as they dealt with the insurance company. Other companies were unable to take the job or handle the job with efficiency to get the ball moving. Since I was needing the job done in a small window of time.”

Latoya G.

Sacramento, CA
On Call Bio Suicide Cleanup Testimony

“Jamie and Greg went above and beyond any expectations in my time of grief. They are professional, courteous and experts in their field of work. They performed all work quickly and professionally. I would highly recommend this company and these men to anyone. “

Erin R.

St. Paul MN

“My father passed away and was left unattended for a few days with His two dogs in the house. We called On Cal Bio on a recommendation from the local police department. John and his team were so helpful, thoughtful and professional throughout this difficult process. They even helped us load my father’s Harley into our trailer because we didn’t have a ramp. John stood with us while his team worked and let us reminisce about our father with him. The team went through everything in the house and saved everything that they could for us. During this incredibly difficult time for us, they put our minds at ease knowing that they would take care of cleaning the house completely and thoroughly. Thank you from the bottom of our hearts, john and team. ”

Jessica S.


“On Cal Bio team made a very hard event much easier. Without them, I do not know how I would have made it through this. Corry went above and beyond my expectations. She was much more than the lead and for that I am more than thankful.”

Christopher R.

Tallahassee, FL
On Call Bio Suicide Cleanup Testimony

“On Cal Bio was very professional and completed the work in a timely and efficient manner. I would recommend them to future clients because of my experience with the professional work done during this stressful time. Good job, Jennifer. “

Michael G.

Boulder, CO

“Tim was compassionate, professional, caring and easy to work with, yet clear with what he needed to do and conscious of safety. His crew were equally caring and professional.”

Peggy H.

Chicago, IL