David Pichosky and Rochelle Wise died of asphyxiation in Florida HALLANDALE BEACH, Fla., March 6 (UPI) -- A retired Canadian couple found dead in their Florida townhouse were asphyxiated and police said Wednesday at least two assailants are to blame. Hallandale Beach Police Chief Dwayne Flournoy told reporters investigators had yet to come up with a motive or suspects in the "senseless" slayings of David Pichosky, 71, and Rochelle Wise, 66, Postmedia News reported. But, he said, the perpetrators' "freedom is short-lived." "I'm confident we'll be able to hold them to justice," Flournoy said. This case is going to be solved. Trust me. Pichosky and Wise met in Toronto and had been married about four years. They were found dead in their winter home in Hallandale Beach Jan. 10 by a neighbor after they failed to show up for a lunch date a day earlier. The couple visited a Jewish temple near their home and went to a Walmart store Jan. 8. They had an online FaceTime chat with a family member Jan. 9. The police chief declined to provide details of how Pichosky, a retired businessman, and Wise, a retired educator, were killed but said evidence at the crime scene suggested at least two people were involved in killing them. He said there was no indication the couple knew their killers. A surveillance video showed an unidentified woman seen walking around the couple's home the morning of Jan. 9. Investigators had been unable to find the woman, who they want to question as a possible witness.