---

---

The first killing happened at about 6 p.m. ET Wednesday when James Martin, 55, was gunned down coming out of a supermarket in Wheaton.


Police learned of the first Thursday attack at 7:41 a.m., when they got a call about James L. Buchanan, 39, who was shot while mowing his lawn at an address on Rockville Pike.


Less than an hour later, police received another call, this time reporting Prenkumar Walekar, 54, was shot while gassing up a minivan at a Mobil station on Aspen Hill Road.


Sarah Ramos, 34, was killed Thursday at the post office in a retirement community called Leisure World.


Laurie Ann Lewis-Rivera, 25, was shot dead Thursday while vacuuming her car at a nearby Shell gas station at Connecticut and Knolls avenues.

---