BOSTON -- Investigators asked for help from tattoo artists who may have inked former New England Patriots tight end Aaron Hernandez, saying they could help in the prosecution of a double murder Hernandez is charged with committing in 2012. The Suffolk district attorneys office stressed that the tattoo artists are considered witnesses, not suspects, and "may have made observations of evidentiary value." Hernandez is charged in three killings. He is scheduled to be arraigned May 28 on two counts of murder for allegedly shooting two men in Boston in 2012, prosecutors said Wednesday. Authorities have not said if there is any connection between those two slayings and the 2013 shooting death of Odin Lloyd, a semi-pro football player whose body was found in an industrial area near Hernandezs home in North Attleborough. Lloyd was dating Hernandezs fiancees sister. Hernandezs lawyers have said that their client looks forward to his day in court. He is being held without bail. Authorities said they hope to speak with the artist or artists who did specific tattoos on Hernandezs right forearm between February 2012 and June 2013. They didnt describe which of his tattoos they are referring to. Both of Hernandezs arms are covered with tattoos, and photographs of his right forearm show inked stars, words and other designs. "Were intentionally limiting our statements so as not to influence any potential observations by tattoo artists," said Jake Wark, a spokesman for Suffolk District Attorney Dan Conley. "We want unvarnished and unrehearsed information." Authorities specifically mentioned several places in their quest for tattoo artists: Hermosa Beach, California; Bristol, Connecticut; Palm Beach and Miami, Florida; Massachusetts; and Rhode Island. They stressed, however, that they are open to speaking with anyone anywhere who did tattoo work on Hernandez during the time period. Hernandez, 24, has been indicted on two counts of first-degree murder and other offences in the July 2012 killings of Daniel de Abreu and Safiro Furtado in Boston. A third man was wounded in that attack, while two others escaped unharmed. Hernandez and an associate had an "encounter" in a city nightclub with the victims before the shooting, prosecutors said. After the men left, Hernandez followed in an SUV and pulled up alongside the men as their vehicle was stopped at a red light, and opened fire, Conley said. Authentic Geneo Grissom Jersey . Directly ahead was open field, the end zone and the Seattle Seahawks place in the NFC championship game. Authentic Lawrence Guy Jersey .J. 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He was sidelined from the start of the season until he was activated April 24. Outfielder Daniel Nava was recalled from Triple-A Pawtucket. Also, designated hitter David Ortiz and first baseman Mike Napoli were not listed in Saturdays lineup because of injuries. The flurry of activity took place before the Red Sox played Tampa Bay, with Boston trying to end an eight-game losing streak. Manager John Farrell said Ortiz has a calf injury. Napoli is still feeling the flu-like symptoms that sidelined him Wednesday and Thursday in addition to hamstring, calf and finger issues. "Were beat up," Farrell said. Saturday was a planned day off for Ortiz to deal with his injury. "This is what his situation called for," Farrell said. Napoli could miss a few days. "I cant say this is a one-day thing," Farrell said. "It might be more days needed than that, and were hopeful to avoid a down time on the DL as well with him.dddddddddddd" Victorino aggravated a hamstring injury from spring training running to first base in the ninth inning of Friday nights 1-0 loss to Tampa Bay. "We recognize where were at," Farrell said. "You have to separate the individual from the teams win-loss record and the streak were on. Its compounded by the stretch that were in, but at the same time, you cant push a guy past a point where its detrimental for him and the risk-reward bar is swayed into the risk category." Victorino missed 22 games early in the season. "We think, through the exams so far, its not as severe as the injury at spring training, but in combination with hamstring and just overall physical ailments that hes battling right now, the two-week break is needed," Farrell said. In 21 games this season, Victorino hit .242 with one homer and 10 RBIs. Nava began the season with Boston. He hit .149 with two homers and three RBIs in 17 games before being sent to Pawtucket on April 22. Last season with Boston, Nava batted .303 with 12 homers and 66 RBIs in 134 games. ' ' '