Man with a grudge over mother’s death sought in slaying of Houston doctor 
 
 Houston Police Department chief Art Acevedo releases a photo of Joseph James Pappas, the suspect in the murder of Dr. Mark Hausknecht, during a press conference at HPD headquarters Wednesday, Aug. 1, 2018, in Houston. less Houston Police Department chief Art Acevedo releases a photo of Joseph James Pappas, the suspect in the murder of Dr. Mark Hausknecht, during a press conference at HPD headquarters Wednesday, Aug. 1, 2018, in ... more Photo: Mark Mulligan, Houston Chronicle Photo: Mark Mulligan, Houston Chronicle Image 1 of / 30 Caption Close Man with a grudge over mother’s death sought in slaying of Houston doctor 1 / 30 Back to Gallery 
 
 After apparently nursing a grudge for 20 years, former constable deputy Joseph James Pappas allegedly got on his 10-speed Schwinn bicycle, rode to the Texas Medical Center and gunned down Houston cardiologist Mark Hausknecht in broad daylight, authorities said.  (CNN) A man whose mother died during surgery 20 years ago is the suspect in the fatal shooting of a prominent Houston cardiologist who performed the operation, police said Wednesday. Joseph James Pappas, 62, should be considered armed, dangerous and possibly suicidal, Houston police Chief Art Acevedo said at a news conference Wednesday afternoon. There was a lot of planning and, sadly, some skill," Acevedo said of the July 20 attack on Dr. Mark Hausknecht. That phone number also is linked to recent listings on a firearms auction website for several guns, ammunition, tactical vests and ballistic plates for car doors. Authorities on Wednesday, Aug. 1, 2018, identified a man who they believe gunned down one of former President George... (Associated Press) 
 
 HOUSTON (AP) — A man suspected of killing one of former President George H.W. Hausknecht's wife, Georgia Hsieh, said police told her that her husband was riding through a construction area when the gunman rode up in front of him and fired three shots while facing him. "It appears that this may have been a 20-year-old grudge that this man held," Acevedo told reporters. They returned around 4 a.m. Wednesday with a pair of warrants — one to search the house and another to arrest Pappas for murder. Acevedo said police searched his home at 4 a.m. Wednesday and found evidence that ties Pappas to the killing, but he declined to elaborate as to the nature of the evidence. "This man is dangerous, this man is capable, this man has some skills." Until about five years ago, Pappas worked in Harris County law enforcement for roughly three decades, according to state records. From 1997 to 2013, he served as a reserve officer with Harris County Constable Precinct 2, after a number of years on the force there and at Precinct 7. CNN called a phone number listed for Pappas' real estate company on Wednesday, but the call went to voice mail. It was unclear whether the guns for sale included the weapon used in the doctor's fatal shooting. A spokesman for Houston police would not comment on the ads. He said the last anyone had heard from Pappas was in a Tuesday morning text message in which Pappas wrote that he was going to kill himself. Authorities say the shooter rode past Hausknecht before turning around and firing. The two lost contact when she left Texas, and she had not heard from him since. The chief said Pappas is white and very fit, and that he's likely getting around on his 10-speed bicycle, which he rides "extensively and almost exclusively." The homicide stunned members of the Texas Medical Center Community, including at Houston Methodist, where Hausknecht was an interventional cardiologist. "We are relieved that the Houston Police Department has identified the suspect and are confident he will be apprehended soon." In 2000, Hausknecht appeared at a news conference at Methodist with Bush after the 41st president was treated for an irregular heartbeat.
– A man suspected of killing one of former President George HW Bush's doctors may have been seeking revenge for his mother, who died on the doctor's operating table more than 20 years ago, authorities said Wednesday. Joseph James Pappas, 62, should be considered armed, dangerous, and possibly suicidal, Houston police Chief Art Acevedo said at a news conference Wednesday afternoon. "There was a lot of planning that went into this," Acevedo said of the July 20 attack on Dr. Mark Hausknecht, adding that it appears a "20-year-old grudge" led to the attack, per CNN. Hausknecht was gunned down while riding his bike to work at Houston Methodist Hospital, which is part of the busy Texas Medical Center. Authorities say the shooter rode past Hausknecht before turning around and firing. A tip on Tuesday led police to suspect Pappas, the chief said, though he didn't elaborate as to the nature of the tip. Acevedo said Pappas hadn't been seen in 36 to 48 hours, the AP reports. He said the last anyone had heard from Pappas was in a Tuesday morning text message in which Pappas wrote that he was going to kill himself. Acevedo said police searched his home at 4am Wednesday and found evidence that ties Pappas to the killing, but he declined to elaborate as to the nature of the evidence. The chief said Pappas, who was a peace officer in Harris County for three decades per the Houston Chronicle, is white and very fit, and that he's likely getting around on his 10-speed bicycle, which he rides "extensively and almost exclusively." Friends and family have described Hausknecht as a humble and generous man who was adored by his patients, volunteered in his community and cared about the environment. He was also an avid cyclist and rode his bike to work each morning, as he lived less than 2 miles from his office.