Patriots spokesman Stacey James said the team had no comment on why Hernandez was there. He said earlier that the team did not anticipate commenting publicly during the police investigation.
The body found about a mile from Hernandez's sprawling home in North Attleborough was that of 27-year-old Odin Lloyd, according to a prosecutor's office. His cause of death wasn't released.
Hernandez is also being sued in South Florida by a man claiming Hernandez shot him in the face after an argument at a strip club.
The lawsuit was filed late Wednesday by Alexander Bradley, who claims in the lawsuit he and Hernandez were with a group in February at Tootsie's club in Miami when the two got into an argument. Later, as they were driving to Palm Beach County, Bradley claims Hernandez shot him with a handgun, causing him to lose his right eye.
Bradley did not mention Hernandez in a police report at the time. Hernandez's lawyer did not immediately respond Thursday to an email seeking comment.
Lloyd was a semi-pro football player for the Boston Bandits, and his family said he had a connection to Hernandez, whose home was searched by police.
Hernandez attorney Michael Fee acknowledged media reports about the state police search of Hernandez's home as part of an investigation but said he and the player wouldn't have any comment on it.
Lloyd's mother, Ursula Ward, would not say how Lloyd knew Hernandez and did not say whether police told her how her son died. An uncle said Lloyd had a connection to Hernandez but wouldn't elaborate.
"My son is a wonderful child," Ward said Wednesday as she cried outside the family home in Boston's Dorchester neighborhood. "He's a family guy. He hasn't done anything to hurt anyone."
Bristol District Attorney Samuel Sutter's office said investigators were asking for the public's help to find a silver mirror cover believed to have broken off a car between Boston and North Attleborough.
Sports Illustrated, citing an unidentified source, reported Tuesday that Hernandez was not believed to be a suspect in what was being treated then as a possible homicide.
Two troopers knocked on the door of Hernandez's house Wednesday morning, but no one answered. The night before, police spent hours there as another group of officers searched the industrial park.
Later Wednesday, at least seven state troopers searched both sides of a road just off the street where Hernandez lives. The officers used thin poles to pull back plants and search through undergrowth along the road.
The Patriots drafted Hernandez out of Florida in 2010. Since then, he has combined with Rob Gronkowski to form one of the top tight end duos in the NFL. He missed 10 games last season with an ankle injury and had shoulder surgery in April but is expected to be ready for training camp. Last summer, the Patriots gave him a five-year contract worth $40 million.
Sports Illustrated reported that the link between Hernandez and the case was a rented Chevrolet Suburban with Rhode Island plates that police had been searching for. The Associated Press could not independently confirm the report.
Lloyd's neighbor Larry Connors said a black Suburban with Rhode Island license plates was towed out of the yard of Lloyd's house after his body was found. Lloyd had been driving it for a few days, but Connors had never seen it before that.
Bandits coach Olivier Bustin, who last saw Lloyd on Saturday at a team scrimmage and heard on Tuesday he had been killed, said he never knew him to be in trouble.
"He was a personable guy, just a guy who was well-liked by everybody on the team," said the coach, who said Lloyd didn't start but played a big role on defense.
Lloyd's sister, Olivia Thibou, said her brother always had her back.
"And, you know, it's just tough that he's not here," she said. "As my mom said, just give us our time to grieve. And I hope that they find out who did it."