Joseph Baldi

On September 19, 1970, Baldi was searching for an apartment, choosing one on 144-96 88th Avenue in Jamaica. After going into a back alley and climbing through the window, he found himself in the bedroom of 23-year-old Greek-Canadian Areti Koularmanis, who was visiting her husband's parents together with her children.[1] To prevent her from screaming, Baldi took out a knife and stabbed her in the throat, causing Koularmanis to stagger out of the room and wake her husband, before collapsing on the floor. While she was driven to the Mary Immaculate Hospital, where she subsequently succumbed to her injuries, Baldi managed to escape and avoid arrest. Despite the police's best efforts, they were unable to find a clue to the killer's identity.[1]

After Koularmanis's murder, Baldi continued breaking into ground-floor apartments around the Richmond Hill and Woodhaven areas.[3] In the early hours of September 5, 1971, a resident of Woodhaven reported seeing a man climbing through a neighbor's window, for which two police officers, John Hamberger and Frank Mobileo, were sent to investigate. After a brief patrol of the area, the two caught up with Baldi and went to question him. As they were about to do so, Baldi whipped out a .22 revolver from his hip holster and attempted to shoot Hamberger, but the gun misfired.[3] Before he could fire again, the officers apprehended him. While examining the detainee's belongings, they found a stolen driver's license, and after contacting the woman, she said that someone had burgled into her apartment and had stolen both her driver's license and money from her purse. For these crimes, Baldi was charged with attempted murder, burglary, theft and illegal possession of weaponry.[3]

Due to his history of mental illness, Baldi was remanded at the Mid-Hudson Psychiatric Hospital in Beacon to undergo counseling while awaiting his trial. He stayed there until November 30, when he was moved back to Creedmoor.[1] In December 1971, he was officially indicted for the aforementioned charges by a grand jury in Queens, but due to the fact that the attorney's office was not notified of his transfer to Creedmoor and the subsequent failure of the institution to be notified of his indictment, he was released a little over a month later on January 21, 1972.[1]

Less than two months after his release, Baldi resumed his criminal activities, escalating the violence in his attacks. On March 18, he entered an apartment in Jamaica through a first-story window, going into the bedroom of 17-year-old Camille Perniola. A mentally disabled teenager who lived with her parents, Perniola was stabbed to death in her sleep, and her assailant fled before her parents could catch a glimpse of him.[1]

Deborah "Debbie" Januszko, Baldi's final victim

On April 13, Baldi broke into the ground-floor apartment of 21-year-old secretary Clara Toriello, who had recently been engaged to a policeman. Despite the fact that she shared the apartment with three family members, Baldi managed to stab her four times in the back and neck after he found her lying in her bed.[1] After killing her, he tore off her bra and panties and then slashed them to shreds. The final attack came on June 17, when Baldi entered an apartment near his rooming house in Jamaica, stabbing 15-year-old Deborah "Debbie" Januszko in the chest. The girl staggered into her parents' bedroom, exclaiming that she had just been stabbed, but before help could arrive, she succumbed to her injuries.[1]

A few days after her murder, some of Januszko's classmates reported to police that they had been stalked by a tall, thin, dark-haired man, matching the description of other women who had reported similar incidents.[1] On June 21, two detectives from the Queens Homicide Squad, Donald Parker and Michael Walsh, stopped a man matching that description while he was walking down the street. The man, Joseph Baldi, agreed to accompany them to the police station, and not long after, he told that he "might have hurt" Januszko.[4] Further inquiries uncovered that Baldi was also wanted for an attempted murder of a police officer, and he would eventually be charged with the other three murders, to which he had made passing references in some of his confessions.[1]

Baldi (right) being escorted by Detective Angelo Lamardo following his arrest

In light of his crimes, it was decided that Baldi would first be brought to trial for the attempted murder of Officer Hamberger, to which he pleaded not guilty by reason of insanity.[5] At the court hearings for the case, Baldi's attorney, Sidney Sparrow, argued that his client was a schizophrenic suffering from dissociative identity disorder (then called "multiple personality disorder") and was thus not legally liable for his crimes.[5] On the prosecution's side, Dr. Daniel J. Schwartz, then-director for the Kings County Hospital's Psychiatric Unit, testified that after conducting an exam on the defendant, he deduced that he was aware of his actions when he attacked the officer.[6] After an 8-day long trial, Baldi was convicted of the attempted murder charge and sentenced to 25 years imprisonment, allowing the prosecutors to move forward with the murder charges.[6][7]

In lieu of the upcoming trial, an agreement between Sparrow and the prosecutors was made that prohibited Baldi's "reenactments" of his murders, during which he walked around opening imaginary doors and wiping blood off imaginary knives in a trance-like state, to be used as evidence.[8] In contrast, prosecutors produced a 45-minute police tape to the court, in which Baldi confessed to the four murders.[4] However, New York Supreme Court Justice Thomas Agresta dismissed the charges in the Koularmanis, Perniola and Toriello murders, citing that Baldi's attorney was only representing him in the Januszko case. The district attorney later attempted to overrule this decision, but the outcome of it is not known.[7]

Concerning the confession tape, Baldi later took the stand and declared that he had no recollection of making such admissions.[9] Sparrow and Dr. Harry LaBurt, a psychiatrist and former head of the Creedmoor State Hospital, later took the stand to present testimony such as exam records and interviews that showcased that Baldi was insane.[9] Despite their efforts, the Presiding Supreme Court Justice, George J. Balbach, ruled that Baldi was fully aware of his actions and found him guilty as charged in the Januszko case.[10] He was then imposed a 25-year-to-life sentence to be served at Sing Sing, which Baldi unsuccessfully attempted to appeal over the years.[11] Baldi would remain behind bars for the remainder of his life, before dying in Sing Sing on October 17, 2009, from undisclosed causes.[2]

The decision to release Baldi from the mental hospital for being a "model inmate" garnered great controversy with the contemporary public in New York City. At the time, he was compared to murderers Charles Yukl and Ricardo Caputo, both of whom were also considered model inmates but continued killing after their release.[1]