IMO.....the jury has two choices.
Either they believe TLM's version of events, or they believe MR's.
The reason for the abduction is a key component of both their versions.
TLM claims she randomly selected a child, because she was under the influence of MR and was carrying out his wishes. Her abduction of VS under those conditions, strengthens her claims that MR sexually assaulted VS and murdered her (as per her first versions of events). As we no know that TLM confessed to the murder, MR can only be found guilty if he participated in the murder, ............or kidnapped or sexually assaulted VS.
If he is found not guilty of kidnapping or sexual assault, he cannot be found guilty of murder, as there was no proof of intent that a murder should take place, or would take place as a result of illegal acts.
MRs version is that TLM kidnapped VS deliberately to hold as collateral for a drug debt. His version of events after that initial contact supports that theory........true of false as it may be.
MR's lawyers are not fighting a murder charge, but the kidnapping and sexual assault.........because without them the murder charge fails.
JMO...........