About Us

crime scene clean up company owner Daniel Maiello

Tom and Danny Maiello are the father and son owner team of Bio-One Henderson. Tom has recently retired from a 33-year career in computer technology companies. Over the past 25 years, Tom has had the opportunity to build, transform and lead both financial and sales support organizations. Tom and his wife Donna, married for 33 years, have two children, Alyssa and Danny. Danny has spent the last 5 years in the fast casual restaurant industry. Over that time, he had the opportunity to grow his skills working in and leading small teams while developing a real passion in meeting customer needs. Tom and Danny are looking to leverage their diverse collective experiences by providing outstanding customer service in a caring and professional way.

You will speak with the owner directly.  No answering machines or call centers. 


When a suicide, homicide, or traumatic death occurs, Bio-One is the best choice for assisting victims and their families.​ We partner with local authorities, communities, emergency services personnel, victim services groups, hoarding task forces, apartment communities, insurance companies and others to provide the most efficient and superior service possible.



Every company performing any sort of decontamination or cleanup services in this industry in Southern Nevada needs to have the correct training. Bio-One hires and trains highly skilled technicians with all the certifications to get the job done. We also understand that this is about helping you get through a tough situation. Our company motto is "Help First, Business Second." Bio-One continues to be the most compassionate organization in the industry. 


1. A call is made to our owner.
2. Our owner will then go through in detail the steps that need to be taken. 
3. A time is then set for the Bio-One Henderson team to complete the job.
4. Payment is addressed after cleanup as it is our first priority to complete decontamination in a discreet and compassionate method for all Bio-One clients.  Getting the job done is our priority.


  • We don't require payment before or at time of service.
  • Insurance covers the cost of 95% of the work we do.
  • You can reach the owner directly 24 hours a day, any day of the week.
  • We can typically be at the scene or job site within one hour.
  • Our clean up or recovery services are typically completed within a few hours.
  • Materials with blood or body fluid on them must be disposed as a biohazard. We have necessary training, licensing and insurance.
  • We have a flawless record, without a single citation or fine in 20+ years of operation.
  • If you have any questions or concerns, feel free to call and if for any reason we are not able to help, we will connect you with someone who can.

Latest Reviews

Bio-One Henderson - Crime Scene Cleanup, Homicide, Suicide, and Hoarding Services


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Amazing Customer Service - by , 2020-01-20 15:27:07

4.62 / 5 stars

I can not say enough how truly thankful I am for this company! I needed help urgently and Danny answered the phone after business hours (thank you again!) and was beyond patient and accommodating. They were very thorough with their work and made sure I was satisfied. Something I really appreciated was how discreet they were with their job. It was a tough time for me but they made sure to put my feelings first and made me feel at ease and comfortable. Thank you for everything!

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Mold Removal Nightmare - by , 2019-07-04 02:24:12

5.00 / 5 stars

After discovering mold in nearly the entire wall of my kitchen sink, in and under my cabinets, and battling a landlord that honestly could have cared less- Danny got the job done! I called Tom at 7:00am almost in tears and frantic, as I have a 4 yr old that lives with me and someone with cancer. I explained the wall was already opened up and had been for 2 days, now I needed someone professional to come remove it safely and completely. Danny showed up less than an hour later and knew exactly what to do. We felt comfortable enough with them to leave a key so they can let themselves in while we were at work. Their professionalism, honest concern & compassion really showed from the first conversation, all the way through to the end of the job. 10/10 would recommend, every single time!

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Quick response & Fair Rates - by , 2019-06-27 16:29:03

5.00 / 5 stars

Danny responded and completed the work very quickly & efficiently... all at a reasonable cost. This will be my first and only call in the future.

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Excellent Service - by , 2019-03-10 13:41:35

4.58 / 5 stars

Unfortunately we had to remove the carpet in my fathers home after he passed away while living on his own. We are from out of town. Danny was able to meet us on a Sunday morning while other companies we called wanted to wait until Monday. Thank You!

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Much Gratitude - by , 2019-03-04 18:04:55

4.58 / 5 stars

Danny and his team were amazing. I live in Alaska and flew down to take care of a death in my family home . Not only did he take care of the bio clean up but cleaned out a home so it look renewed. So trustworthy!!!!!!!!

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A horror not easy to forget. - by , 2019-02-23 12:20:11

4.58 / 5 stars

Tenants left all floors covered in pet urine, feces, food. Every sink, toilet BLACK. Kitchen was caked in filth. Sight, smell overwhelming! Danny and crew were amazing, professional, fast, thorough & affordable. Rescued me and my home. Very kind people.

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Friendly compassion - by , 2018-09-08 19:42:09

5.00 / 5 stars

I want to thank Tom and Danny for all their hard work & care they have shown my husband and me during a stressful time. They were working with us with the greatest level of compassion and friendliness, reducing so much of our anxiety. Thank you!!!

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Complete Home Clean Up - by , 2018-08-23 18:50:09

5.00 / 5 stars

I can’t say enough about Tom & Danny on the professionalism & personal approach they took to the exceptionally great job of cleaning our house! Words & emotions can never express our gratitude, appreciation to them for their hard work! “TY” Tom & D

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Hoarding Clean-up - by , 2018-08-10 17:35:51

4.50 / 5 stars

I can’t thank you enough! You helped my brother more than all the doctors he's been to since Vietnam.  Giving him a new start after his wife died means everything! You have restored our faith in humanity with your integrity, hard work and compassion!

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- by , 2018-05-18 08:51:46

5.00 / 5 stars

Thank you Bio-One, for a job well done. Look foward to working with you again.

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out of 19 ratings