Orlando, Fla- Authorities say some people may have been injected with tainted blood after attending a series of sex parties in south Orlando. Mark Randall, the suspect in the case, is being held at the Seminole County Jail.

The Orlando man is accused of having sex parties in a garage. Police first raided the house for drugs, then ended up stumbling on some bizarre videotapes.

For months, neighbors were trying to figure out what was going on in the home. Residents say men would go in and out of the home all throughout the night. Police started investigating the home after an informant told police that Mark Randall was selling drugs.

After watching the house for some time, police then searched Randall’s bedroom and found drugs and needles filled with blood.

But that’s not all.

According to court records, “Randall lured subjects to his residence via the Internet for the purpose of having sex.” He would then get them high.

Police say all these activities happened in the garage in the back of the house. A harness was set up and Randall and other men would have sex with the victims and videotape them.

The affidavit also states, “Randall would inject the subjects with drugs as well as tainted blood.”

Mark Randall is being held without bond. At this point, police do not know if the blood is contaminated and will test it for any diseases.

Investigators would like to hear from anyone who may have had recent contact with Randall.