Paralympic and Olympic track star Oscar Pistorius was convicted of culpable homicide last month for the shooting of his girlfriend Reeva Steenkamp on Valentine's Day.

Now he faces up to 15 years in jail.

On the second day of his sentencing hearing, Pistorius's agent Peet Van Zyl was grilled over the athlete's charity work, which the defence hopes will mitigate his sentence.

But lead prosecutor Gerrie Nel suggested that the charity work was not entirely selfless -- but a useful marketing tool for self-promotion.

(SOUNDBITE) (English) LEAD PROSECUTION LAWYER, GERRIE NEL SAYING:

"So the fact is that it is merely an advancement of your career to become involved (in charity work). "

(SOUNDBITE) (English) OSCAR PISTORIUS AGENT, PEET VAN ZYL SAYING:

"I think that a lot of sportsmen actually really want to make a difference and contribute."

(SOUNDBITE) (English) LEAD PROSECUTION LAWYER, GERRIE NEL SAYING:

"But as a bonus, as a flip side -