Below is an analysis of the shooting dates and times. The times that start with "P" are the prayer times in the time zone of the shootings. Before and after the indicated shooting times.
The time in bold is the supposed shooting time. The times of the shootings seem to fall well before or after prayers except for #3 wish is close and #10. #10 was at 8:15 P.M. and an exact match for the Isah pray time.
That would indicate that a devote Muslim is not the shooter is they are following prayer times. But, combining the 5th (Maghrib-Evening) and 6th (Isha - Night) is allowed. Usually when the Muslim is "traveling". So, the actual prayer time for #10 could have been 6:53 P.M. if the 5th and 6th prayers were combined.
#1 (P-4:29P.M.) 5:20 p.m.(P-7:06 PM) Oct. 2: Windows shot at craft store in the unincorporated Aspen Hill area of Montgomery County, Md. No one hurt.
#2 (P-4:29P.M.) 6:04 p.m. (P-7:06 PM) Oct. 2: James D. Martin, 55, of Silver Spring, Md., killed in grocery store parking lot in Wheaton, Md. (Montgomery County)
#3 (P-7:26 A.M) 7:41 a.m. (P-1:15 P.M.) Oct. 3: James L. "Sonny" Buchanan, 39, of Arlington, Va., killed while cutting grass at an auto dealership in unincorporated White Flint area. (Montgomery County)
#4 (P-7:26 A.M) 8:12 a.m. (P-1:15 P.M.) Oct. 3: Taxi driver Prem Kumar Walekar, 54, of Olney, Md., killed at gas station in Rockville, Md. (Montgomery County)
#5 (P-7:26 A.M) 8:37 a.m. (P-1:15 P.M.) Oct. 3: Sarah Ramos, 34, of Silver Spring killed outside post office in Silver Spring. (Montgomery County)
#6 (P-7:26 A.M) 9:58 a.m. (P-1:15 P.M.) Oct. 3: Lori Ann Lewis-Rivera, 25, of Silver Spring slain as she vacuumed her van at a gas station in Kensington, Md. (Montgomery County)
#7 (P-7:26 A.M) 9:15 p.m. (P-1:15 P.M.) Oct. 3: Pascal Charlot, 72, of Washington, killed while standing on a Washington street.
#8 (P-1:15 P.M.) 2:30 p.m. (P-4:23) Friday: 43-year-old woman wounded in craft store parking lot in Fredericksburg, Va. (Spotsylvania County)
#9 (P-7:30 A.M) 8:09 a.m. Monday (P-1:14 P.M.): 13-year-old boy wounded as he is dropped off at school in Bowie, Md. (Prince George's County)
# 10 (P-8:15 P.M) 8:15 p.m. (After Prayer Hours) Wednesday: Dean Harold Meyers, 53, of Gaithersburg, Md., killed at gas station in Manassas, Va. (Prince William County)
#11 (P-7:35 A.M.) 9:30 a.m. Friday (P-1:13 P.M.) : Man shot to death at gas station in Fredericksburg. Investigation pending on possible link to previous shootings.