LA CROSSE, WI (WTAQ) - Friends have established a reward fund for information leading to an arrest in the killing of a man and his son inside a La Crosse photography store.

56 year old Paul Petras and his 19 year old son A.J. were killed September 15th.

Petras’ wife says she opened the account when friends asked her about offering a reward. One contributor says he hopes the fund will grow to as much as $100,000.

As of last Friday, more than $6,000 was being offered.

The shooting took place inside May’s Photo in La Crosse.