"It appeared to me Zock(s) was barking toward the Moxley's house, " said the witness, who was 11 years old in 1975.

CNN: Moxley Case: Defense witness gives Skakel alibi

Behind Ketterer was Joseph Zock, president and portfolio manager at New York's Capital Management Associates, with a 25% gain on freight outfit CNF.

FORBES: Big Bets

The study authors, Dr Jan-Paul Zock and colleagues from the Municipal Institute of Medical Research in Barcelona, said work was needed to determine the biological mechanism behind the increased risk.

BBC: NEWS | Health | Housework 'can cause asthma'