The family of a gay teenager shot dead at school in the US are suing education officials for letting him wear make-up and feminine clothes which they say motivated his killer.

The parents and brother of 15-year-old Larry King, from Oxnard in California are seeking damages because the school failed to enforce the school dress code.

The teenager was shot in February - his classmate, Brandon McInerney pleaded not guilty to the killing last week.

He was charged as an adult and also faces a charge of a committing a hate crime.