This article was reported by Abby Goodnough, Nate Schweber and Javier C. Hernandez, and written by Ms. Goodnough.

BOSTON  An eviction notice hangs on Philip Markoff’s door at the apartment complex where he lived with his fiancée, and the medical school where he took the Hippocratic oath has suspended him indefinitely.

Mr. Markoff’s wedding is now officially delayed, too: his fiancée’s family canceled the B-Street Band, hired to play Bruce Springsteen hits at the beachfront reception on Aug. 14, its lead singer said Monday.

But while Mr. Markoff’s seemingly normal life has crumbled in the week since his arrest on charges of killing one woman and robbing another at gunpoint after meeting them through Craigslist, hints have been slow to emerge as to why he might have committed the crimes.