On Monday morning – just hours after the Planet Fitness on Hardegan Street opened for the day – officers were called to a report of a body inside a tanning bed at the gym. Gym-goer Elizabeth Len revealed she had gone to the Planet Fitness that morning and noticed a “foul smell” which seemed to get stronger near the tanning rooms.

Days after Derek Sink’s body was discovered in a Planet Fitness tanning bed, his mom Karen Wetzel shared more about her son and what may have led up to the moments before his death.

Karen Wetzel speaks with PEOPLE about her son Derek Sink's last moments before he was found dead in a Planet Fitness tanning bed in Indianapolis. He had been in the tanning bed for three days before he was discovered.