Update, June 19: This post originally said Mannina had planned an “assignation” with his co-worker, but there is no basis in court filings or testimony to characterize the June 5 encounter as anything other than a get-together of platonic friends.

What accounts for a rare violent crime in the leafy Forest Hills neighborhood of upper Northwest? Details revealed in court Monday in the case of a shocking home invasion and sexual assault tell the tale of an assignation a day off gone very wrong. The victim and suspect Paul Mannina, co-workers at the U.S. Labor Department, “planned to skip work and spend the day together” on June 5, the Post’s Keith Alexander reports. But when Mannina arrived at the woman’s home, authorities said, he “pushed his way past his colleague’s front door, handcuffed her, sexually assaulted her and left her with such extensive injuries that she required surgery to implant a plate in her face.” At a preliminary hearing Monday, Superior Court Judge Robert I. Richter heard testimony from neighbors who called Mannina a “family man,” and a detective who said Mannina had he recently been hospitalized for a “change in his mental state.” But Richter ordered him held in D.C. jail: “There are some dark things floating out there,” he said.

Update, 10:42 a.m.: Mannina was found dead this morning in his D.C. jail cell, Alexander reports.

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Kids attack Red Line riders during evening rush (PostAP)

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