Arnold, Mo (KSDK) -- Family and friends remembered three Jefferson County girls who police said were killed by their own mother.

Police believe Lisa Cochran killed them before killing herself.

Faith Ehlen, 22-months, Autumn Cochran, 10, and Alyssa Cochran, 11, were found in a vehicle parked outside a home near DeSoto one week ago.

Police said Cochran purchased a shotgun a few days earlier and sent a goodbye email to her former boyfriend, family and friends hours before the bodies were found.  Police said all four were shot in the head.

The funeral for the girls was at 10 a.m. at  Heiligtag Lang Fendler Funeral Home at 1081 Jeffco Boulevard.  The sisters were buried next to each other.

KSDK