The teen faces charges of first-degree murder, kidnapping and violation of a no-contact order, the sheriff’s office said.
Authorities also learned the teen claimed self-defense after fatally shooting his father on Valentine's Day last year in Lincoln County, Oklahoma, Judd said.
He was accused of assaulting her in November and arrested, Judd said.
The teen claimed self-defense, Judd said, but the grandmother disputed the teen's account and he was arrested on suspicion of domestic violence battery, the sheriff's office said.
The sheriff's office in Charlotte County, where the alleged assault occurred, did not immediately respond to a request for comment.
Persons:
Grady Judd, Judd, Valentine's
Organizations:
NBC, Facebook, Authorities
Locations:
Oklahoma, Florida, Auburndale, Tampa, Polk County, Fla, Winter Haven, Charlotte County, Lincoln County , Oklahoma