ABC: Hasan Was Worried About HIV Test

Major Nidal Hasan seemed worried about the results of an HIV blood test taken a week before the Fort Hood shooting rampage, according to federal investigators piecing together background details on Hasan's life.

The information came from a member of the Fort Hood medical staff who was in the building where Hasan is accused of opening fire on November 5 and killing 13 people.

The investigators said there was no indication that Hasan was HIV positive, although a bottle of medicine used to treat HIV-positive individuals, Combivir, was seen in Hasan's apartment by ABC News last week. Medical experts say many doctors also have Combivir on hand in case of an accidental needle stick. A second drug seen in the apartment, clarithromycin, is an antibiotic designed to treat respiratory infections. However, it can also be used to treat specific opportunistic infections in patients with HIV.