"Home is where the heart is." Edgar Allan Poe makes a mockery of this shopworn phrase in "The Tell-Tale Heart," expressing some deep anxieties toward the very idea of "home" (as in the place one hangs one's hat) and "home," (as in the larger community). Here home (in both senses) is a place of violence, death, disease, anguish, and isolation. It's also a place where mysterious hearts tell tales in the night, grim tales, of home gone bad.
"The Tell-Tale Heart" can be used to examine the current problem of elderly abuse.