He was holding the knife in his right hand in such a way that if he held it out at arms length with the blade pointing down, the cutting edge would be facing him.
He grabbed her from behind and threw her to the floor. He inflicted two puncture wounds, one on the right side of her neck and one under her chin. He also inflicted a large slashing wound, pulling up and from left to right. After the struggle was over, but she was still gasping for breath, he rolled her onto her back. At that point, her bra was pushed up above her breasts. He then moved her to the place where her body was found.
No.
She was not stabbed while on the floor, she was standing or kneeling. The pattern of blood stains show she was standing or kneeling also when she received the second blow. Blood droplets from her lungs are at almost 1 meter of height on the closet.
Rudy or others didn’t proceed to do other things right away after the stabbing, because Nara Capezzali (who is credible, contrarily from what people claim) heard a person running out immediately after the scream.
Rudy didn’t remove her trousers after the assault, because her trousers were clean and had no significant blood stains.
He did not push up her bra because the bra has no stains from finger, and he did not manipulate her sexually because her breast is clean and his right hand was bloody.
Rudy didn’t touch any part of her body nor her cloths after the killing, because he had an injured hand and he left no blood droplets, and he had one hand dirty with her blood too.
He did not move her right after the stabbing, because the body remained near the closet for some time and was moved only after at least 10-15 minutes as the coddling of the blood stains shows.
Blood stains show the attack did not take place in one corner, but in various places in the room beginning from the entrance door.
Moreover, the perversion of sexual attraction for dying or dead people is very rare, and not likely at all (while Rudy’s psychological profile instead was quite transparent to his friend and previous girlfriends, and no clue of such fantasies is available), and not needed.
She was not punctured under her chin, she was punctured on the right side and then hit on the left side after just a first touch, as on the left side the minor wound is only millimetres from the main wound.
Moreover, Meredith had a hand grabbing her mouth for long minutes before she was stabbed, which suggests a sexual violence was carried out during this time, not after.
Moreover, she had a number of bruises (including hold bruises on her hip) suggestive of an active sexual violence, on a living and fighting person. Moreover, the bra fastener was cut with a clean knife.
Your reconstruction conflicts with an impressive array of findings.