Indianapolis police are investigating the city's second and third homicides of the new year. The first shooting happened Thursday morning at Chuck's Mobile Home Park in the 5200 block of Massachusetts Avenue on the north side. Officers responding to reports of gunshots at about 9 a.m. found a male victim they say is in his mid-40s. No suspect was found. A half-hour later officers responded to another fatal shooting on the north side, this one near 46th Street and Haverford Avenue. Police say Gerald Alexander was shot in the head after answering a knock at the front door.