Indiana State Police say two ‘persons of interest’ are now in custody for questioning in the murder of a Greene County man. 54-year-old David Lamm of Newark was murdered Saturday at his residence. Police announced Sunday 41-year-old Kevin Caldwell was in custody. Indianapolis Police took 35-year-old Jason Caldwell into custody around four-o-clock this morning. Both men are wanted on Greene County warrants on unrelated charges.