Here’s a look at tomorrow’s top talkers from Washington Post reporters and columnists who know the topics best.

GRAND JURY IN FERGUSON: Attorney General Eric Holder is in Ferguson today and a grand jury is set to begin hearing evidence related to Brown’s death. St. Louis County Prosecutor Robert McCulloch said it could take until October to hear all of the evidence related to the shooting, according to Mark Berman. Carol Leonnig, David Nakamura and Krissah Thompson are on the ground in Ferguson. As if the situation around St. Louis wasn’t tense enough, temperatures will rise to scorching levels for five days.

MCDONNELL TESTIMONY: During day 18 of the corruption trial, testimony from a management consultant with a PhD in clinical psychology revealed Maureen McDonnell may be depressed while e-mails show frustrating among the first lady’s staff. Rosalind Helderman, Matt Zapotosky and Laura Vozzella are following the latest in court.

WHO IS FOLEY’S EXECUTIONER?: Griff Witte reports that the death of an American journalist at the hand of a London-accented extremist has prompted a deep reckoning among Britons and the government’s concern is some of these fighters will return home, putting domestic security at risk. In January, Witte reported on officials’ fears about British citizens joining the increasingly radicalized war effort in Syria. At the time, several hundred Britons were known to have joined the fighting. Liz Sly wrote in October 2013 that foreign fighters dominated the war in Syria, with Saudis, Tunisians and Libyans are among the most frequently encountered nationalities.

TREATMENT FOR EBOLA-LIKE VIRUS FOUND?: Brady Dennis reports that researchers for the first time have effectively treated monkeys infected with the deadly Marburg virus, even when the treatment began days after the animals were exposed and had begun showing symptoms, according to a new study. The findings could prove significant in part because the type of Marburg involved — the most lethal form — is closely related to the Ebola virus responsible for the devastating outbreak in West Africa.

WASHINGTON REDSKINS TEAM NAME: A day after Mike Ditka calls the Redskins name debate stupid, Post columnist Mike Wise talks to Mike Carey, the first African American referee to work a Super Bowl, who told his employers his desire for a mutually respectful society was so jeopardized by Washington’s team name that he could not bring himself to officiate the games of owner Daniel Snyder’s team.