Police believe Lloyd was killed between 1 a.m. and 6 a.m. Monday, but his well dressed body was not found until 5:30 p.m. by a teenage jogger, several law enforcement sources told ABC News on the condition of anonymity because they are not authorized to discuss the case.

State Police searched the Hernandez home that he shares with his girlfriend Shayanna Jenkins, the mother of his infant daughter, with a warrant several times. Hernandez was seen going inside the house Wednesday with his mother and has not emerged since.

Jenkins' sister, Shanea Jenkins, was dating Lloyd, who played for the semi-pro football team Boston Bandits, several law enforcement sources told ABC News.

Shanea Jenkins could not be found in the aftermath of her boyfriend's murder, and investigators were concerned for her safety. Police were able to locate her Wednesday, the sources said.

Investigators have also searched three Enterprise rental cars that were registered to the NFL star, including one that had its silver mirror knocked off. That vehicle, sources said, was recovered at an Enterprise location in Boston Wednesday, a day after police issued a BOLO [Be On The Lookout] for it. The sources said it had been dropped off abruptly sometime Tuesday with the broken mirror.

Another rental vehicle was recovered not far from Lloyd's body. A third rental was stopped from pulling out of Hernandez's driveway Tuesday by state police and its two occupants were questioned and released. Police were seen searching that car Tuesday night.

In another development in the case, ABC News has learned from investigative sources that Hernandez had partied with Lloyd at a Boston nightclub Friday night into Saturday morning. Police reviewed surveillance video Wednesday that was taken at that club.

http://abcnews.go.com/US/aaron-herna...1#.UcM2ZNjpxIq