Kidnapping in the Second Degree (NY Penal Law § 135.20) -> Class B felony, 5 to 25 years in prison
Kidnapping in the First Degree (NY Penal Law § 135.25) -> Class A-I felony, 20 years to life or even life without parole
First degree would involve the victim being restrained for more than 12 hours with intent to commit certain crimes, or if the victim dies. Also if ransom is involved, it will also be escalated from second degree kidnapping
Other charges are likely involved in this specific case as well, which may stack onto the severity