CLARKSVILLE, Tenn. — Serious questions continue over what happened after cell phone video showed a Clarksville police K-9 biting a suspect who died several days later at the Montgomery County Jail. The cause of death is not yet known. Still, a legal expert is weighing in on the use of force as the Clarksville Police Department and the Tennessee Bureau of Investigation investigate the incident. We spoke to criminal defense attorney Ben Raybin, who watched the viral video of the arrest involving the K-9 that bit Darius Chappell for nearly a minute. He said he believes police used excessive force. Video from a bystander shows several law enforcement officers struggling to arrest Chappell on Fort Campbell Boulevard. According to the affidavit of complaint, officers tased him numerous times. A Clarksville police officer released a K-9 on Chappell while he was on the ground. The dog appears to bite him for 59 seconds. Defense attorney Ben Raybin has expertise in cases involving police dog bites. "This could very potentially be an excessive use of force," Raybin said. Raybin said officers have to take several things into account, including the crime the person is accused of, whether they are resisting arrest and the circumstances of the moment. Court records show Chappell had a felony warrant for violating parole and had previously fled from police on Fort Campbell Boulevard by running "into oncoming traffic." After the altercation and police dog bite, the Montgomery County Sheriff's Office said Chappell was taken to the hospital and then medically cleared before being booked into the Montgomery County Jail. Chappell was charged with parole violation, assault against a first responder, resisting arrest, and evading arrest. Four days later, Chappell died.