ROTHBURY, MI - Sixteen people spent time in jail rather than at the Electric Forest Festival they intended to be at, according to a police wrap-up of services provided during the five-day event.

That's twice the number sent to the Oceana County Jail in 2015, according to reports from the Michigan State Police.

The State Police post in Hart on Tuesday afternoon released its annual summary of law enforcement services provided during the music festival that ended Monday.

About 50,000 people attended the festival located at the Double JJ Resort in Rothbury. The Michigan State Police have been contracted by festival promoters for several years to provide on-site law enforcement.

The report shows what the troopers from posts across the state were up to:

57 original complaints were investigated.

16 people were lodged in the Oceana County Jail.

21 people face possible arrest pending review of charges by the Oceana County Prosecutor's Office.

Charges that were investigated include:

29 felony drug charges.

Five misdemeanor assaults.

Seven misdemeanor drug charges.

Three misdemeanor trespassing/disorderly conduct charges.

Three misdemeanor fugitives from justice.

Troopers also responded to or assisted emergency medical services and festival security on numerous medical calls.

Police reported earlier that they also are investigating the death of 22-year-old Michael John Stephenson of Lansing who suffered a medical emergency after the festival around 9:30 a.m. Monday.

Lynn Moore is a reporter for MLive Muskegon Chronicle. Email her at lmoore8@mlive.com and follow her on Twitter and Facebook.