Mr Larkov tried to fight back and was shot five times in the chest, before Samar turned his gun on Ms Larkov and shot her in the chest and head.
The killer and an accomplice then pocketed the 255,000 RUB (£3,236) Mr Larkov brought to buy the car, along with his phone, and stuffed the bodies inside.
They then forced the terrified girl, who watched both of her parents be murdered, back into the car before rolling it into the lake.
Samar went to work at his job as a prison guard in Sevastopol just hours after the brutal murders, carrying the jail-issued gun he shot his victims with.
Detectives tracked him down a week later and he made a full confession, even leading them to the bodies and reenacting the sickening crime.
Police were alerted when worried neighbours called the police when the family failed to return home or answer their phones.
Neighbours put up missing person posters around their home town of Feodosia after hearing the family dog whining from thirst and hunger.
'The adults died from numerous bullet wounds. After being killed they were put into their car,' local police said.
'No bullet wounds or injuries were found on the child's body. She was forced into the car alive and drowned.'
Samar faced life in prison but the brutality of his crimes prompted many Crimeans to lobby for capital punishment to be reintroduced.
