Detailed Instructions: In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
Q: Passage: Following his arrest, Sandford was held in the Nevada Southern Detention Center. Due to his mental health conditions, Sandford was kept in solitary confinement and repeatedly put under suicide watch. On June 20, 2016, a complaint was filed with the United States District Court for the District of Nevada charging Sandford with committing an act of violence on restricted ground. Sandford appeared in a Nevada District Court on June 20, 2016, where he was charged with committing an act of violence on restricted ground. Sandford's public defender, Heather Fraley, argued that Sandford should be bailed to a halfway house given his lack of a criminal record, but he was denied bail by judge George Foley Jr. on the basis that he presented a flight risk and was a potential danger to the community. On June 29, a federal grand jury responded to an indictment filed by United States Attorney Daniel Bogden by charging Sandford with three felonies: two counts of being an illegal alien in possession of a firearm and one count of impeding and disrupting the orderly conduct of government business and official functions. Each charge carried a maximum sentence of 10 years' imprisonment and a fine of $250,000. U.S. Immigration and Customs Enforcement also issued a detainer against Sandford relating to an immigration violation.
Link Information: Daniel G. Bogden (born 1950) Answer: 66
A:
How old was Daniel Bogden when he charged Sandford?