Markoff was removed from the around-the-clock surveillance, although a source told ABC News, "He is extremely withdrawn." Markoff is still wearing the paper clothing that he was given when put on a suicide watch.
The suspect broke down during a weekend visit with his family, telling his brother to "forget about [him]" and that "there's more coming out," ABC News has confirmed.
"It is unclear if he meant more victims or more evidence," a law enforcement official familiar with the visit told ABC News.
ABC News has also obtained court documents in which Markoff, a medical student, pleads poverty. The documents claim that he has not received any financial support from his family for several years and that he is living off student loans that total $130,000.
In response, the court ordered Markoff's lawyer, John Salsberg, to defend him at the public's expense, the court documents state.
The emotional family visit Friday, first reported by the Boston Herald, was the first time the 23-year-old's family had seen Markoff since his arrest in connection with the murder of Brisman, a 26-year-old massage therapist.
One of the alleged victims, Las Vegas masseuse Trisha Leffler told CBS "48 Hours" Saturday she survived an attack by Markoff and that after he tied her up and took her money, he stopped to take a memento.
"He picked up a pair of my underwear that were on the floor and put them in his pocket," Leffler said. Last week, investigators found panties belonging to two of the alleged victims in Markoff's apartment.
Though Markoff's attorney, John Salsberg, said Markoff's family remains "very supportive of him," McAllister has yet to visit him in jail, and a bandmember who was scheduled to play at the couple's August wedding said the gig was canceled.
"The McAllister family contacted me late Friday evening and basically told me the wedding was off," Will Forte of the B Street Band said.
McAllister was not the only one coming to the former medical student's defense.
Sunday, ABC News received a statement from a close friend who said Markoff has been unfairly labeled "a murderer and a menace to society" by the media. The friend declined to be identified, at the request of Markoff's family.
In the statement, the friend said Markoff had endured what amounts to "a public lynching of an individual who, in reality, has few character flaws," but Markoff's family and friends are "keeping hope of an unbiased trial."
ABC News has obtained an e-mail that was sent to Brisman's regular clients. The e-mail has been entered into evidence in the case against Markoff, who is accused of killing her after he responded to her ad on Craigslist.
Brisman, 26, of New York City, had booked a hotel room in Boston for Sunday through Wednesday night, April 12-15, according to one of those regular clients who booked frequently with Mary Beth Simons, the New York owner of a tanning salon who once shared an apartment with Brisman.
Simons is cooperating with police and helped provide the link that led Boston Police Department homicide investigators to Markoff's Quincy home after he used his real name and address to set up an e-mail account a day before Brisman was shot three times at point-blank range and had her head bashed in, several law enforcement sources said.
The e-mail obtained by ABC News reads: