Investigators for the Federal Bureau of Investigation have joined Michigan State University Police and other agencies to continue searching East Lansing for 18-year-old Brendan Santo, the teen who disappeared while visiting friends at MSU on the rivalry game weekend of Oct. 29.\u00a0 Santo, who is from Rochester Hills in suburban Detroit and attends Grand Valley State University in western Michigan, was last seen leaving Yakeley Hall on MSU's campus shortly before midnight on Oct. 29, campus police said. He has now been missing more than a week. "He was last seen wearing gray sweatpants, a black T-shirt, a black baseball hat and white Converse high-top shoes," police said. Santo is described as 5-foot-10-inches, 160 pounds. His family is working with Crime Stoppers of mid-Michigan to find anyone who can provide credible information that leads to his safe return, according to reporting by WWJ News Radio. On Nov. 6, the Santo family asked MSU Police to share that they're offering a $5,000 reward to anyone with credible information that leads to bringing Brendan home. This reward will be managed through Crime Stoppers of Mid-Michigan through the existing MSU Police and Public Safety toll-free tip line and tip email, according to a press release issued by MSU police. "At this point, foul play is not suspected in Brendan Santo\u2019s disappearance, and we have received no other reports of missing persons. We also do not believe that Brendan intended to harm himself," police said in the release. Authorities believe he was on foot when he disappeared; his car has been located, according to reporting by AP. And there is no indication Santo left the East Lansing area since his vehicle was found where he parked it. The search has focused on the Red Cedar River, which flows through two miles of campus and is in close proximity to Santo's last known location, but police said they "continue to investigate other possibilities." On Nov. 2, police blocked off part of a parking lot near the river. Diving equipment could be seen. The effort to find Santo has included searches by foot, drone, helicopter and boat and has utilized canine units, divers and civilian volunteers. The investigation has used advanced techniques to review cellular, smart phone and GPS data. The data is also being reviewed by the FBI, according to the release.\u00a0 Police also said Santo\u2019s phone, which has not been recovered, shows no activity. "We are confident that we have obtained the available information from his digital footprint," police said. Santo\u2019s family members "encourage community members to continue to keep their eyes open and provide tips or information to investigators," police said. And on Nov. 6, dozens gathered in East Lansing to "keep their eyes open" and search. Volunteers lined up at 11 a.m. at the MSU Union, where Santo's family and friends distributed maps of areas to search. Among those handing out maps Saturday were Santo's aunt, Dawn Brewer, and cousin, Kelsea Brewer, according to reporting by Lansing State Journal. By 3 p.m., much of MSU's campus had been included in the search. "Anything that people are bringing back to us ... we're forwarding over to police and they've been very responsive," Brewer told Lansing State Journal. Audra Snayko, a Midland area resident who took part in the search, said there was a huge outpouring of volunteers that showed up to the MSU union to pick up maps and search designated areas around the massive campus. "I\u2019m just sorry that we really didn\u2019t turn up anything of use to the family or the authorities," Snayko said. "My son is a sophomore at MSU and lives in Brody neighborhood where Brendan was visiting friends so this hit particularly close to home for me as a parent." According to the Facebook page Bring Brendan Santo Home, Brendan did not have his car keys when he disappeared. But he did have his friend's car keys in the zipper back pocket of his sweats. Below is a picture of the extra set. The one they're looking for is on a single ring with the key fob, the car key and a blank key. "We are not sure if they are still in Brendan's pocket or if they fell out," reads the post. "If anyone is searching today please add this to the things to be out on the lookout for." The tip has been handed off to the police for further investigation, according to the page. The page is also asking residents in the area with outdoor cameras or Ring cameras to check for footage from before midnight on Friday, Oct. 29.\u00a0 Tips about Santo's whereabouts should be shared with MSUPD at 844-99-MSUPD, or Crime Stoppers at 517-483-STOP.