Domestic violence has long been an issue in the NFL. Many players have been accused of domestic violence over the years and many have been convicted.It's a problem that the league is well aware of and has been working hard to correct.Players who are accused of domestic violence often face lengthy suspensions from either their team, the league, or a combination of the two.Parallel to the league’s personal conduct policy, a guilty verdict is not always necessary for a player to receive a suspension for domestic violence allegations. Being accused is sometimes enough to receive one.Here are five players who have been suspended for their involvement in a domestic violence case.#1 Greg HardyDallas Cowboys EDGE Greg HardyGreg Hardy was found guilty of assault during the 2014 offseason while with the Carolina Panthers after he reportedly threw a woman onto a futon that was covered in assault rifles in his home. The charges were later dropped during an appeal when the victim chose not to testify on the stand.Hardy was originally suspended for 10 games, but his punishment was reduced to four games after a successful appeal. He played for the Dallas Cowboys during the 2015 season before leaving the NFL and joining the UFC.#2 Adrian PetersonSeattle Seahawks RB Adrian PetersonIn 2014, while still a member of the Minnesota Vikings, Adrian Peterson was indicted on felony child abuse charges. The incident was a result of Peterson reportedly using a wooden switch to punish his four-year-old son.FS1@FS1Adrian Peterson's suspension has been overturned. #3Thingsamp.twimg.com/v/d9dae196-6c1…78Adrian Peterson's suspension has been overturned. #3Thingsamp.twimg.com/v/d9dae196-6c1…The league front office suspended Peterson for six games, which was upheld following an appeal. Peterson and the NFLPA filed an unsuccessful lawsuit against the league for the way they handled the case.He was back in the news for the wrong reasons earlier this year. In February, he was arrested at Los Angeles Airport by the police for assaulting his wife in a plane before it took off. Peterson was released later in the day after posting a bond of $500,000, However, his wife later denied that her husband physically assaulted her and the domestic violence charges were dropped.