Possibly, but I think it looks like Patsy had been crying. I don't think sedative use causes red eyes. The Barbie was laying in its box, I believe. Too bad the photos aren't clearer or uncropped.
Most little girls love dolls. Some grown women, too. I love dolls myself and at one point had quite an extensive collection of vintage Barbies and Ginny dolls. (all gotten and sold via eBay).
When my daughter was young, I enjoyed buying her dolls as much as she loved playing with them. That in itself is not unusual or odd. But I never thought of my little girl AS a doll, mine or anyone else's. With Patsy, it isn't the basement Barbie that is odd- it looks to be that year's (1996) Holiday issue doll- a fairly common gift at Christmas for many little girls. Of course, though the DOLL is not unusual, its being found in the basement near the dead body of its owner IS unusual.
JB liked Barbie, owning a large My Size (almost 3 feet tall) as well as the seeming Holiday Barbie in the basement photo and presumably several of the more common play-size Barbies (about 12 " tall). And she loved her Barbie nightie too.
The doll delivered to Access Graphics after JB's death was an American Girl doll. That is a doll that comes in many varieties depicting girls in all eras of American history. I am not sure what one was delivered. JB was said to own a "Samantha" American Girl doll. All the American Girl dolls are 18" tall with vinyl limbs and heads with rooted hair of varying colors and styles, and all have stuffed cloth bodies. They are made by the Pleasant Company. The dolls came with a white cord around their necks which held the vinyl head onto the cloth body. The cord was NOT the same kid of cord found on JB (which was flat nylon). The doll's manufacturer suggested that parents put a piece of duct tape over the knot in the cord at the back of the dolls' neck so that the knot and cord didn't interfere with brushing the dolls' hair or fastening the dolls' clothing.
The MyTwinn dolls are now made by Mattel, I think. Not sure if that was the case in 1996.