Darryl Scott Donohue, 43, pleaded not guilty in the Launceston Supreme Court on Monday to two counts of having incited another person to murder his ex-wife Angie Maree Donohue, 36, in mid-2013.

It is part of the agreed facts that Donohue was jailed in February 2013 after he pleaded guilty to having ordered a hit on the same woman.

Today, during evidence-in-chief questioning from Crown prosecutor Jackie Hartnett, Detective Constable Keith Brightman told the court the prisoner informed him that Donohue promised him a "magic set of Tas Keno numbers" which would yield individual pay-outs of up to $25,000.

Detective Brightman said the prisoner also told him that Donohue said the Keno numbers would earn a maximum of $300,000 over a six-month period.

The numbers would magically appear on a piece of paper once heated inside a toaster, Detective Brightman said the prisoner told him.

In the event that the Keno numbers failed, the detective said, Donohue had promised the man $20,000.

Detective Brightman said the prisoner told him that Donohue had offered him all of these things in exchange for murdering Donohue's ex-wife Angie.

Under cross-examination from defence counsel Evan Hughes, the detective said he interviewed Donohue about allegations that Donohue's brother and father had monitored the complainant.

Detective Brightman said that Donohue was mostly silent but then became upset and aggressive when he suggested to him the possibility of Donohue's father and brother getting into trouble if the allegations were proven.

The trial, before Justice Robert Pearce, continues.