. >> this morning the nathan carman who was rescued after being left at sea for a week is trying to stop him from inheriting millions of dollars. his three haunts are filing petition alleging that he was the last to see both family members alive. asking for him to invoke slayer rule to prohibit them from inheriting money from a person they killed. >> the family is alleging that it indicates that nathan should not profit by the actions. >> 23-year-old nathan carman who has aspburger syndrome has denied any involvement in killing the grandfather who was wealthy. >> i had no i don't havement in my grandfather's murder. >> they point to a gun they say he purchased but was never recovered. for linda, they were nearly 100 miles offshore last september when the boat began taking on water. telling us it sank so quickly he didn't have time to make a mayday. >> i was calling out to my mom. >> in hours of the dramatic rescue by a chinese freighter the police again not buying the story. searching for his home of evidence he deliberately sank the boat. >> "7 on your side" call center, we have a phone

this morning, the family of nathan carman who was rescued after being lost at sea for more than a weekng to stop him from inheriting millions of dollars from his missing mother and murdered grandfather. attorneys for carman's three aunts filing a petition alleging their nephew was the last to see both family members alive. asking a civil court judge to invoke the slayer rule, prohibiting a person from inheriting money from someone they killed. >> family is alleging that the evidence indicates that nathan carman killed he should not profit from his actions. >> reporter: nathan has not been charged with any crime and denies any involvement in the 2013 killing of his wealthy grandfather, john chakalos. >> i had absolutely no involvement in my grandfather's murder. >> reporter: at the time investigators considering carman their chief suspect. a search warrant pointing to a gun they say he purchased but was never recovered. the same type as the murder weapon. as for his mother linda, nathan says they were nearly 100 miles offshore last september when their boat began taking on water. tellin